My 2006 Envoy Denali stops running suddenly and then refuses to start
The engine quit while driving on the highway. Both check engine lights came on. After 45 minutes while waiting for a tow the car started. Dealer replaced the ignitions switch (shorted) and computer reprogrammed for "driveability". The throttle body had been replaced about 6 months before. After repairs exact same problem occurred. Second tow to the dealer and resultant "loose connector on main outlet from fuse box". Picked car up and got 10 miles before same problem occurred. Any ideas.
Don't Sell it. Trade it in. Once you get into running take it to a dealer that didn't work on it.
This is a serious problem with this truck the dealers are guessing and guessing wrong people are replacing ignition switches, fuses boxes computers, and after 10 mins of driving same problem, will I fix the issue by powering up the fuses that was not getting power when truck would not crank and all tap of difference codes would appear and disappear when starts, in my truck those fuse are # 31 55 23 26 54 56 30 and I power up this fuses by taking power from a open J case fuses ran a wire from j case fuse to fuses # 31 and it power up all the fuses above then I had to power up the fuel pump relay by using a 30amp fuse and using power source between fuse # 27 and 29 it comes on when you turn the key open and off when you turn off and then I removed the pcm fuses, fuses # 10 in my truck and my truck has never ran better does cut off.
Check the fuse box under the hood. I had the same problem I replaced it with a new one to fix the problem. When it heats up one of the copper wires inside the fuse box comes disconnected I tried soldering the wire but it just happend again. I recommend replacing with new.
Did you ever get it figured out
Which wire is the one that needs to be solder under the fuse box? I called dealer they want $750 for a new fuse box
Replaced Engine Computer. My problem is that car shuts off after being on for 20-30 minutes. After that, it either cranks with no start or it stays on, but you get throttle body codes along with ignition switch codes. Also, reduce power and misfires. You can feel the car trying to shut off and won't run properly. Also, on digital climate control. temperature outside reads 50 degrees when this is happening. I'm going to change the FUSE BOX in the engine compartment or add a power that is missing incase that's the problem. Anyone else fix this with replacing fuse box?
New Programmed Engine computer did not fix problem. Forgot to add that.
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