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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for March 24, 2012
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Open Help Requests for GM
Help Request Answers
2004 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP54KX4
Hello gents - i have this buick that has me scratching my head. Mil light is on with codes p0442 and p0455 and message on instrument cluster say "check fuel cap/fuel cap loose." need to get this car a state inspection and will not pass with mil on. No other s... Trouble codes: P0442 (Evap emission small leak detected), P0455 (Evap emission gross/large leak detected)
2009 Buick Enclave CXL 3.6L No Start, blows ecm1 fuse VIN: 5GAER23D99
Came in on the hook with a blown ECM1 fuse. (F28 is by the ECM1 fuse in the under hood panel) You would think it would be a piece of cake to trace down a constant drain, but there are ground wires that run three different ways to three different areas and all ...
1999 Chevrolet K3500 6.5L Excessive Emissions VIN: 1GBHK33F4X
This truck Has a long crank after it is warmed up. Upon looking observing the data I found the ECT reading negative 40. I tested the 5 volt refrence and ground wires at the sensor both are good. I checked the 5 volt refrence wire for a short to anny other 5 vo...
1999 GMC C7500 Topkick C7H042 7.4L No Start VIN: 1GDJ7H1D4X
Randomly crank no start when you let of the key it will backfire, cycle the key and it will fire right up and run smooth, cycle the key the next few times and it will start fine?? When you are cranking and it will not start and you inject propane it will start...

Fixes & Summaries for GM
Fix/Summary Answers
2004 Cadillac Escalade 6.0L MIL Lamp on
First thanks to all who helped. The problem was yes a restricted evap canister. The new one i put on fixed the problem and my FTP sensor reading are now normal and no more check engine light. The customer is really happy now considering that he can fill up at ... Trouble codes: P0446.
2002 GMC Envoy SLE 4.2L lifter ticking VIN: 1GKDT13S22
had already checked all the replies.this is my wifes car and has done this since we have owned it. for 4 years.we are selling it as is.thanks for all the help.
2003 Other GM HOLDEN ZC VECTRA .0L Engine VIN: W0L0ZCF684
Put a little bit of oil in the cylinders and cranked Motor, Recheck compression on the low cylinders Again and came back to normal. Figured the rings were sticking due to vehicle not running for a while. Refit manifold and tried to start again, started but mi...
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