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Vehicles with certain V6 engines may illuminate the Check Engine Light one or more of the following codes: P0011, P0014, P0021, P0024, P0341, P0346, P0336, or P0391. Our technicians tell us that some vehicles may require a powertrain control module (PCM) software update to correct this issue. Other vehicles may have excess camshaft end play on one or both cylinder heads which will need to be corrected using special procedures outlined by GM.

The supercharger may develop a noise in the front section of the supercharger assembly. The is due to a worn coupler. Our technicians tell us that a remanufactured coupler section is available from aftermarket suppliers.
One or more of the rear lights may be out due to a failed light socket plate.

A weak battery or a burned out brake light bulb may cause the ABS light to illuminate.

The front or rear exhaust manifold may crack causing an exhaust leak. Our technicians tell us the manifold should be replaced to correct this condition.

The anti-lock brake (ABS) pressure modulator valve assembly may fail internally causing the ABS light to illuminate.

The Engine Control Module (ECM) can fail causing stalling, and engine and transmission drivability concerns.

The ABS accumulator may fail causing loss of power brake assist. (The brake pedal will become very hard).
Air flow from the dash vents may be incorrect due to a damaged engine vacuum hose near the battery tray.

Fuel injectors can short-circuit electrically causing a rougher than normal idle and reduced performance.

One or more of the rear suspension links may become bent causing a severe rubbing noise.

The anti-lock brake (ABS) accumulator may fail causing loss of power brake assist. (The brake pedal will become very hard.)

The anti-lock brake (ABS) accumulator may fail causing loss of power brake assist. (The brake pedal will become very hard.)

The ABS master cylinder assembly may fail internally causing the ABS light to illuminate.
The ABS master cylinder assembly may fail internally causing the ABS light to illuminate.