Two problems related to check engine light on have been reported for the 2002 Chevrolet Avalanche. The most recently reported issues are listed below.
2002 chevy Avalanche 2500 with 8. 1 engine dies without warning at driving speeds. The battery light comes on, after the vehicle shuts down, but no check engine light and no warning whatsoever. The vehicle just shuts down. When this happens there is no power steering and no brakes for this 7000 pound vehicle. Sometimes, once pulled over and shutting everything off and trying to restart it will restart, sometimes taking up to 10 minutes of trying to crank it intermittently before it will restart. It has done this, off and on, at random intervals over the years I have owned it. I have read on the internet others from who have the same problem and most likely solution seems to be the crankshaft position sensor which some say has been recalled on the 2001 model engine for the silverados, but cannot find anything for the same 2002 engine, which is the same engine. This is dangerous and frightening enough at "back road" speeds, but considerably more so at major highway speeds as the vehicle loses all power when the engine shuts down, leaving the driver unable to steer, brake or immediately restart the vehicle leaving it stalled in the middle of the interstate there is no code in the ecm so the dealers have not been able to diagnose it. Does someone have to die before something is done?.
1. Check engine light. . . 2. Oil light. . . 3. Noise still present and getting worse. Returned vehicle to university motors. . . 1. They cleared the codes and said may have been due to gas(I use bp gas) 2. Added 2 qts. Oil(oil was changed on 12/29/02@university motors and replaced the pvc valve. 3. Rear locator bar was loose they tightened.