Went to car wash in 02 avalanche, have seriously washed under hood before and this time I quickly washed the motor and concentrated on shocks and inside of wheels through the engine compartment let idle with heater on for 10 minutes.........the vehicle died and wont start. HELP PLEASE

 

I am too having the same issue. luckily I found a thread which describes my problem the best - Problem with pickup in Chevrolet spark

 

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I am sorry to hear about your Avalanche. It really is difficult to diagnose a problem like this over the internet. Have you been able to start the vehicle since this occurred? Does the vehicle make any noise when attempting to start? Does any of the electrical work (headlights, radio, etc.)? You may have take the vehicle in for an inspection.

Keep me posted. I look forward to your reply.

Louis
GM Customer Service