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2003 Chevrolet Avalanche 1500 Questions

Get answers to questions about your 2003 Chevrolet Avalanche 1500 at RepairPal. Find solutions, diagnose problems and get back on the road.

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65
questions

handheld scanner said multiple cyl.misfire,coilpacks on right side would stall running vehicle if disconnected,left side had no change and would not stall vehicle after disconnecting coil packs.

abs and brake lights come on whenever im going over a small bump or pot hole it also says to service brake system when i already serviced the brakes... my speedometer isnt working also..i dont know what it could be please help.......

when you turn off the vehicle the heater blower stays on

When I bought my car from the dealer used, the knock sensor light came on, and dealer told me that they reset it, and that if it comes on again, they would pay for a new sensor.

What if it's not the sensor, but an actual knock in the engine? Would I hear it? Is there major problems associated with this engine message?

Thank you,

Chris Kennedy

Driver info center (dash board)is telling me the "left rear door ajar" when it's not. Fuses are good. The door switch is inside the door and can not be seen. What do I do?