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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for June 22, 2009
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Open Help Requests for GM
Help Request Answers
2004 Buick Rainier CXL 4.2L unknown
This vehicle makes a clunking noise under hard acceleration-feels like engine miss-but it is not. It feels more like a drivetrain jerk. I do not know what else to try. Thanks in advance for the help.
1991 Cadillac Allante 4.5L No Start, Poor Idle Quality, Stall VIN: 1G6VS3381N
Greetings all, I have this wonderful Cadillac, that I shouldn't have touched,came in as no start after customer bar-b-qued it. Low compression, coolant shooting out of radiator when cranking all the obvious blown head gasket signs. Sold a complete valve job. W...
1991 Cadillac DeVille 4.9L Blower Motor VIN: 1G6CD53B7M
Odd one here, at least for ME. Customers complaint is that the blower motor is on HIGH all the time, even with the key in the OFF postion, key OUT of the ignition lock. Only way to disable the blower motor is to remove the 30 Amp fuse for the a/c system locate...
1992 Chevrolet S10 4.3L Surge, Misfire VIN: 1GCCT19Z2N
Hello all! First time posting because the database has always answered all my tough problems. YOU GUYS ARE AWESOME! Iatn has been the best tool Ive ever bought! My problem is one of connecting my Mt2500 scanner (red brick) I went to connect to this s-10 today ...
1994 Chevrolet Blazer 5.7L power loss VIN: 1GNEK18K2R
i have this blazer that when going up hill it looses mph and when you push down on throttle it doesn't accel until it drop down a gear then it will pick up speed slowly unless you put it all the way to floor . fuel psi and volume ok and exhaust back pressure i...
1994 Chevrolet Lumina APV 3.1L No Start, VIN: 1GNDU06DOR
vehicle now runs for 15-20 minutes and burns out the secondary side of the ignition coil. we have replaced the coil twice and it still burns them out. i have not found any further help on mitchell. any help from the pro's out there would be a great help. thank...
1997 Chevrolet Camaro Z28 5.7L MIL Lamp on VIN: 2GIFP32PXV
Car came into shop from another shop saying the could not fix it. Check engine lite was so we hooked up scanner and it had a code of p0123. Code says its the tps sensor out of range or voltage to high. First shop put a tps on it an it did not fix problem . I c... Trouble codes: P0123
1998 Chevrolet C1500 Cheyenne 5.0L Starting
This truck was towed in for the second time in one month with a no start.No codes,fuel pressure is 20 psi(with new fuel pump)have rpm signal during crank.We attach the spark tester to the plug wire to check for spark and it starts immediatly,fuel pressure incr...
2001 Chevrolet Express 3500 8.1L MIL Lamp on, No throttle VIN: 1GBJG31G71
We have been wrestling with this beast for a long time! As you can see in history, we or another shop have replaced almost everything to try to fix this. The problem is very random. You will be driving along and the "reduced power" light will come on and the t... Trouble codes: P1120 (1 TPS out of range), P1221 (2 TPS out of range)
2001 Chevrolet Prizm 1.8L MIL Lamp on VIN: 1Y1SK528X1
hello out there i have a car here that i am stumped on. this car came in with a cat efficiency code and a po171 system lean code. we replaced the cat and cleard the code and shiped it. it came back with the po171 code the freeze frame indecated that the code w... Trouble codes: P0171
2002 Chevrolet Silverado 2500 HD 6.6L 4-5 shift VIN: 1GCHK23112
I need some help on this one. this 02 Allison 1000 came in with code P0753 an slip in 5th gear under a load. we replaced C2,&C3 clutch Steels & Frictions,Trim sol. A ,Shift sol.C,D,E. Installed the trans an it still slip in 5th gear under heavy load. And it co...
2003 Chevrolet Tahoe LT 5.3L compressor VIN: 1GNEC13Z03
it is shutting down after while of running. no cold are and pressures go back to 100 on both sides.runs good if it cools off for about2 hours.but 10min. later it shuts off.
2003 Chevrolet Impala 3.4L Unknown VIN: 2G1WF52E73
Intermitant (800 mi) delayed take off from stop sign, hit the gas and nothing happens, when it takes off it feels like you hit the gas from neutal and dropped it into gear. Never any codes, car came from a car lot and this is a used trans that was replaced for...
2005 Chevrolet Cobalt 2.2L air bag VIN: 1G1AK52F65
2004 Chevy Cobalt with intermittant power steering light, and air bag light. The lights never stay on long enough for you to plug the scanner in and see what the codes are. The power steering light comes on while she is driving down the road, then will go off....
1998 GMC W3500 Forward W3S042 3.9L Engine VIN: J8DC4B1KXW
This is a 1998 GMC tilt forward truck with a 3.9L turbo diesel motor. It melted the number 2 piston. I am purchasing 4 new piston w/ ring and sleeve assemblies. I normally do not work on diesel motors. I need the torque specs. for the head and rod caps. No com...
1999 GMC Savana 1500 5.7L 3-2 shift VIN: 1GDFG15R0X
well this van came in for suspected warranty trans problem for it is a re-man trans which was installed about a year ago,it was originally stack shifting with no codes & was being commanded to do so,checked wiring,& all inputs which was good so we replaced ECM...

Fixes & Summaries for GM
Fix/Summary Answers
2004 Cadillac SRX 3.6L No Start VIN: 1GXDE63774
Unfortunately we have not fixed this vehicle and are somewhat out of ideas. According to the replies received and checking the information again, the vehicle has obfvr, on board fueling vapor recovery. Because of the symptoms of p0446 block evap vent path and ... Trouble codes: P0044.
1999 Chevrolet Silverado 1500 5.3L Transfer Case VIN: 2GCEK19T5X
James from Arkansas was closest followed by Tom from New York. Sadly, the majority of replies were wrong. I ordered a replacement transfer case and as soon as it got here I put a crescent wrench on the shift shaft. 3 Positions. This T-case has only Hi...
1999 Chevrolet K1500 Suburban 5.7L Hesitation VIN: 1BNFK16R8X
2002 Chevrolet Avalanche 1500 5.3L right rear pad VIN: 3GNEK13T32
Lots of guys chimed in about replacing the rubber flex line, we did replace it even though we checked for residual hydraulic pressure with a gauge and found none. Many also replaied about the mud shield that Gm has a tsb for on the pickup trucks with the same ...
2004 Chevrolet Malibu LS 3.5L alternator control VIN: 1G1ZT54834
Hello and thanks again for your time and info. The wire goes to the pcm checked continuity and replace pcm. The light has stayed out for 2 weeks now. I recieved 8 replies all together someone wanted to fax me motor magazine info got two of those almost emidiat...
2004 Chevrolet Classic 2.2L Poor Idle Quality, Hesitation VIN: 1G1ND52F74
Well I decided to go ahead and tear it all the way down to confirm what I thought had happened, as there is no way to scope a cam/crank on this without a tru cam sensor. The chain had jumped 3 teeth on the crank. Both cams in time to eachother still. As i ...
2004 Chevrolet Trailblazer LS 4.2L Hesitation, Stall, MIL Lamp on VIN: 1GNDT13SX4
found corrosion inside ecm connector between vss signal and crank sensor signal so when the vss put out enough voltage it would mess with the crank signal. thanks to those who offered help Trouble codes: P0332, P0335, P0340.
2005 Chevrolet Malibu LS 3.5L Poor Idle Quality VIN: 1G1ZT52865
Performed induction cleaning and Throttle body cleaning. Customer has driven for 3 weeks and we have not heard back from him.
2007 Chevrolet Express 2500 4.8L Hydro Boost? VIN: 1GCGG25V87
Thanks to all that responded. I ended up going with a pretty aggresive brake fluid flush due to not being able to duplicate the problem again. It has been gone for a while now and I haven't heard anything so hopes are high. Thanks again Mike
2008 Chevrolet Express 2500 LS 6.0L Excessive Emissions, Poor Idle Quality, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on, Runs BADD VIN: 1GAGG25K18
Thanks for all the replies-Shaharazad from NY was correct-broken valve spring in #3 cylinder.What made this difficult was the MAP code p0106 was not a factor & compression result(s) were fairly even in all 8 cyls-took apart & found after help reply.Thanks agai... Trouble codes: P0106, P0300, C0561.
1998 GMC Jimmy Envoy 4.3L Mode door VIN: 1GKDT13W5W
Finnally got the car back and put in an actuator, all is well. Thanks to all
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