2012 Chevrolet Avalanche Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2012 Chevrolet Avalanche
Never overpay. Check prices with our estimator
Verified by mechanics, reported by drivers like you
2012 Chevrolet Avalanche ProblemsReduced Power and Check Engine Light
The throttle position sensor (TPS) on the Chevrolet Avalanche, including the Black Diamond Edition, is notorious for failure which causes:
- Check engine light
- Reduced Power message
- OBD trouble code P2135
This issue is related to the throttle position sensor, and can be caused by faulty wiring to the TPS, bad connection at the TPS, or a failed TPS.
To correct this issue, the wiring harness, connector, and throttle position sensor must be inspected, tested, and/or replaced. The most common cause is a faulty TPS.
The upper dash may crack, most commonly on vehicles in warm climates and exposed to a lot of sunlight. The common repair is to replace the upper instrument trim panel. Information on a technical service bulletin or extended warranty is not available at this time.
2012 Chevrolet Avalanche RecallsIgnition Switch
The ignition switch actuator can bind causing the ignition switch to stick in the "start" position. If this were to occur the actuator can unexpectedly release, cause the ignition switch to snap back into the "Accessory" position. This would cause the engine to turn off with an associated loss of brake and steering power assist. If these conditions were to lead to a crash the airbags may not deploy as expected. Dealers will inspect and replace the ignition lock housing as necessary to correct this concern.