RunningRoo's GM VVT solenoid set 12636175 is a four-piece retail offer for selected GMC, Buick, Cadillac and Chevrolet enquiries. The most important buying distinction is simple: four solenoids supplied does not mean four solenoids must be replaced on every vehicle. The workshop should diagnose the fault, identify the required positions and verify the references before the owner decides whether this set suits the approved repair.
Review GM VVT solenoid set 12636175 at RunningRoo and the matching RunningRoo eBay listing, then send the VIN, engine code or RPO identification and workshop OE list to RunningRoo. Call 0425 890 125 for friendly Australian-operated support. Melbourne local pickup in Blackburn is available by appointment, and fast dispatch arrangements can be discussed for confirmed available stock. Keep the exact product link in the enquiry so the four-piece offer is not confused with a single valve or a different engine application.
Use the part reference as a starting point
Reference 12636175 appears in the retailer title and in the official GM document discussed below. That is useful identification evidence, but it does not establish universal compatibility across every GM engine or prove the origin of the aftermarket product. A reference number in a listing should be checked against the vehicle's required service part. The final decision needs the full application and the workshop's diagnosis, not only a matching number in a search snippet.
The retailer's application table includes several brands, capacities, model years and engine descriptions. This article does not reproduce that broad table as a verified fitment guarantee. Give the supplier the exact vehicle and engine identity and ask for a specific confirmation. If the vehicle is a Holden or another related-market model that is not the selected offer's primary description, do not infer compatibility simply from shared corporate branding.
For imported vehicles in Australia, include original-market details and the build information available in the records. If the engine has been replaced, explain that before the catalogue lookup. The body VIN and installed engine need to be reconciled by the workshop, particularly where a broad online model list creates several plausible candidates. An accurate identification process prevents a familiar GM reference from becoming an unsupported promise.
What the official GM coverage document actually says
The GM Special Coverage 16115, hosted by NHTSA concerns certain 2014 Buick LaCrosse and Chevrolet Impala vehicles with the 3.6 litre LFX engine. It describes exhaust camshaft-position performance codes associated with a sticking actuator solenoid and lists reference 12636175. Its service instructions require diagnosis and direct replacement of the exhaust valve or valves corresponding to the relevant codes, rather than automatic replacement of every valve in the engine.
This is a historical, application-limited GM document hosted by NHTSA. It is not a current warranty promise for an Australian owner, an approval of this aftermarket set, or evidence that every model in the retailer table shares the same fault. Ask the technician whether the information applies to the exact vehicle and what current service information requires. The useful purchasing lesson is to keep the diagnosed replacement quantity separate from the number supplied in a retail bundle.
That distinction is especially valuable when an owner sees a four-piece package after receiving a recommendation for one or two components. Ask the workshop whether the set is appropriate for its confirmed requirement and what it intends to do with any additional units. A package can be a convenient supply choice without becoming a technical instruction to replace parts that have not been identified as requiring replacement.
Map the workshop requirement to the package
| Question | Why it matters | What to record |
|---|---|---|
| Which vehicle and engine? | The retail application list is broad | VIN, build information and engine code or RPO |
| Which position requires a valve? | A system name does not identify location | Technician's named bank and cam position |
| Which OE reference is required? | Similar-looking valves may be different candidates | Catalogue reference and any verified supersession |
| How many units are needed? | Four supplied does not mean four diagnosed | Confirmed replacement quantity and reason |
| What comes with each valve? | Accessories should not be assumed | Supplier-confirmed seals or hardware, if any |
| What work accompanies replacement? | The product is only part of the repair | Manufacturer procedure and completion checks |
| What happens to unused units? | Kit terms may differ from single-item sales | Agreed handling before opening or fitting |
The current package list states four engine variable timing solenoids. It does not establish a full gasket set, wiring harness, cam phasers or timing-chain components. Ask the supplier about any accessories your workshop expects, and list separate requirements explicitly. Do not expand the product description based on photographs from another offer, or assume that the four-piece quantity includes every item needed for an unrelated timing repair.
Ask for a report that names the required component
When a workshop recommends a VVT solenoid, ask it to identify the location and the evidence supporting replacement. A broad statement such as “timing fault” is not a sufficiently precise order instruction. Keep the complete diagnostic report with the vehicle details and the technician's explanation. If the report is provisional, ask what further investigation is required before the parts list can be finalised.
Record the original complaint in useful terms, including when it occurs and any recent work or maintenance. Do not turn an observation such as rough running into a diagnosis of four failed valves. The appropriate manufacturer diagnostic process should determine the repair. A retailer can help match an established requirement to a product, but the availability of a set should not decide which components the workshop concludes are faulty.
If the vehicle has already had a similar repair, provide the previous invoice and installed part references. Explain whether the complaint changed, disappeared temporarily or remained unchanged, using the workshop's records where available. This helps the technician interpret the current situation and avoids repeatedly ordering parts without reviewing the earlier outcome. The purchase should support a clear repair decision rather than replace the need for one.
Bank and cam-position labels should stay attached to the enquiry
Ask the technician to write the required position in full instead of relying on an informal “left one” description. Vehicle orientation and shorthand can be misunderstood between an owner, parts supplier and workshop. Use the terminology from the applicable service information and keep it attached to the OE reference. The goal is to ensure that everyone is discussing the same requirement without guessing from a photograph of the engine bay.
If several valves are involved, ask for a small position-by-position list. It can show the identified reference, quantity and reason for replacement at each location. This is more informative than a quotation saying “four VVTs” and makes it easier to compare the workshop's plan with the selected four-piece offer. It also creates a useful record if the final scope changes after further inspection.
Do not infer intake/exhaust interchangeability merely because the supplied pieces appear alike. Have the workshop and supplier verify the required application. This guide does not supply a universal positional interchange rule or claim that all engines in the retail table use the same arrangement. The official document is cited within its own limited scope; the actual vehicle's catalogue and service information remain the basis of the order.
Decide whether a set is the right buying format
A four-piece set may suit a repair that genuinely requires the confirmed components in that quantity. It may also be considered where a workshop has a documented reason for purchasing additional units. Ask for that reason and compare the total cost with the approved requirement. More pieces in a package do not automatically make it a better purchase if the application or intended use of some units remains unresolved.
Before buying, ask how unused items are handled under the current sales terms. Do not assume an opened set can be split for a partial return or that one fitted component leaves the rest eligible for an exchange. Keep the supplier's written answer and the order details. This is a practical commercial question to resolve before installation, not a substitute for the workshop's decision about which parts need replacing.
If you prefer eBay checkout, compare the matching RunningRoo eBay listing with GM VVT solenoid set 12636175 at RunningRoo and make sure the enquiry names the same four-piece offer. Call 0425 890 125 when you need clarification. RunningRoo's friendly support can help confirm the current supply, while the technician should approve the application and replacement quantity. Using one agreed list prevents a bundle purchase from silently changing the repair scope.
Separate aftermarket identification from OEM endorsement
A listing can use an OE reference to identify the intended replacement without being a genuine manufacturer-branded product. This article does not describe the set as factory supplied or endorsed by GM. Ask RunningRoo for the current product details and any available supporting information relevant to your purchase. Do not infer manufacturing origin, test certification or service life from the presence of an OE number in the title.
Likewise, the official GM document does not provide a performance guarantee for this retail set. Its role is to support a limited technical point about diagnosis and replacement scope on specified vehicles. Keeping those evidence types separate makes the guide more useful: the manufacturer document informs the technical discussion, the retailer confirms what it sells, and the workshop determines whether the offered components meet the actual repair requirement.
Plan the installation and supply together
Ask the workshop whether its estimate includes the applicable removal, installation and completion operations, plus any separately required materials. This guide does not provide generic resistance values, direct-power tests or torque settings. Those details must be taken from the correct service information for the vehicle. An abbreviated online test or a video showing another valve should not be used to declare this set necessary or ready for installation.
Then confirm availability and timing with RunningRoo. Fast dispatch for confirmed stock and the carrier's delivery estimate should be considered separately. If the vehicle is already booked, provide the required date and ask what can realistically be arranged. A stock display is a preparation-time observation, not a promise that the same quantity will remain available until a future workshop appointment.
For Melbourne local pickup, arrange a Blackburn appointment and provide the order reference. If the workshop is collecting, send it the confirmed four-piece package details. Australian-operated support can make communication easier, particularly when a position or reference needs clarification, but collection should follow the fitment decision. The supplier should not have to guess which engine or solenoid set the person arriving intends to collect.
Inspect the delivery and document what was installed
Before fitting, ask the technician to compare the delivered units and labels with the approved references and quantity. Retain the packaging while any question is resolved. If an item differs from the written confirmation, contact RunningRoo with clear photographs and the order reference before installation. Do not alter connectors or mounting features to make an unverified component fit a different requirement.
The final invoice should state how many valves were installed and where, rather than simply copying “set of four” from the purchase receipt. If fewer than four were fitted, retain a record of the unused units and their agreed handling. That precision matters to future service work because the number purchased and the number installed can legitimately differ. A clear record avoids turning a retail bundle into an inaccurate repair history.
At handover, ask how the original complaint was reassessed and whether further recommendations remain. A new component and a cleared warning are not the same as a fully documented outcome. The workshop should explain the completion checks appropriate to the vehicle and the repair. Keep the diagnostic report, parts invoice and labour record together so later enquiries can be based on evidence rather than memory.
Frequently asked questions
Must all four solenoids be replaced together?
Not simply because the offer contains four. The workshop should determine the required components and quantity using professional diagnosis and the applicable service information. The cited GM document has a limited application and reinforces diagnosis-led replacement; it does not make a four-piece retail set a universal replacement rule.
Does 12636175 fit every GM 3.6 litre engine?
No blanket claim is made here. Confirm the VIN, engine code or RPO, production information and required OE reference. The retailer's broad application table is a starting point for checking, not proof that every GM vehicle with the same capacity uses the same valve arrangement or service part.
Does the official bulletin provide Australian warranty coverage?
This guide does not promise that. The historical GM document has specific vehicle and programme conditions. Any current coverage question needs to be checked through the appropriate manufacturer channel for the actual vehicle. The document is used here for technical context, not as a sales or reimbursement promise.
Are cam phasers or chain components included?
The selected package lists four variable timing solenoids. It does not list cam phasers or timing-chain parts. If the workshop requires other components, obtain separate confirmed supply and keep those requirements visible in the quotation. Do not assume the word VVT includes the entire timing system.
Can a general VVT video diagnose my vehicle?
No. A related video can help an owner understand terminology and prepare workshop questions, but it does not establish a fault, compatibility or the correct procedure for this engine. Use the applicable manufacturer information and professional testing before deciding which components to purchase or install.
How can I buy with Melbourne support?
Review GM VVT solenoid set 12636175 at RunningRoo, compare the matching RunningRoo eBay listing, and call 0425 890 125 with the VIN and workshop parts list. RunningRoo offers friendly Australian-operated support, Melbourne local pickup in Blackburn by appointment and fast dispatch arrangements for confirmed available stock. Confirm the exact references and required quantity before placing the order.
Related RunningRoo video
Start-Up Rattle? VVT Solenoid Inspection & Cleaning | Oil Control Valve | RunningRoo. Related general oil-control-valve inspection footage. The video is not verified as this exact part or engine and is not a substitute for the applicable manufacturer test, cleaning or replacement procedure. Do not infer fitment or a cleaning recommendation for your valve from the video.
Related guide with a different scope
VVT Oil Control Valve (Camshaft Solenoid) Failure: Symptoms, Testing and Fix. This is a separate engine, component reference or general background guide. It is not an interchange claim. The specific buying decision in this article remains tied to its named product and verified vehicle requirement.
Sources and evidence boundaries
GM Special Coverage 16115, hosted by NHTSA. Manufacturer information supports only the limited context described above. Retail contents and application leads come from the linked seller offers and are not independent OEM certification. Use the applicable complete service information for the actual vehicle and repair.
Review the RunningRoo product and the corresponding eBay offer, or call 0425 890 125. Contact RunningRoo with VIN, engine code and OE details for friendly Australian-operated support. Ask about Melbourne local pickup in Blackburn by appointment and fast dispatch for confirmed available stock; confirm item-specific fulfilment before booking labour.