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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 2, 2011
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
2005 Buick Rendezvous Ultra 3.6L No Start, MIL Lamp on VIN: 3G5DA03765
2005 buick rendevous ultra 3.6 code p0449 also no start after filling fuel tank . Trouble codes: P0449
2004 Cadillac DeVille 4.6L Stall, MIL Lamp on VIN: 1G6KD54Y24
Car came in with check engine light on. Cust complaint was that it stalls at lights sometimes as well. I found that it had codes for crank sensor A so I replaced both of them with parts from the dealer. It also has a code p0741 for TCC stuck off. Cust chose no...
1990 Chevrolet K2500 Silverado 5.7L Surge, Misfire VIN: 1GCFK24K1L
problem occurs only at cruising speed in overdrive under light acceleration. it feels like a miss. once it shifts out of overdive the miss goes away and vehicle runs fine with plenty of power and does not skip a beat. have replaced all tuneup parts. and have r...
1995 Chevrolet K3500 6.5L No Start, hard starting VIN: 1G8KC34F0S
Customer brought truck to school after computer and injector pump had been replaced for hard starting. Was setting code 36 as well. Truck will roll white smoke, smells like raw fuel and is very hard to start. We checked glow plugs and they were OK, pulled fuel... Trouble codes: 36 (Injector pulse width long)
1999 Chevrolet Tahoe 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNEK13R2X
Scratching my head here... I have a misfire only at idle and at speeds under 40mph. I recommended full tune up to customer. They installed plugs and wires themselves. Verified proper wire routing and firing order. I replaced cap, rotor, and injector assembly (... Trouble codes: P0300 (Random misfire detected)
2003 Chevrolet Monte Carlo SS 3.8L all guages and radio VIN: 2G1WX15K32
Hey all you GM guys out there! I have had this monte carlo ss in my shop for over a week now, working on it off and on. Customer complaint was that upon getting out of storage for the winter the guage cluster and radio were not working. When car arrived at sho...
2004 Chevrolet Aveo 1.6L No Start VIN: KL1TJ52634
Vehicle is a no start with no codes present. Will run if you spray carb cleaner in throttle body. Vehicle came in with a coolant leak under intake manifold. Had to remove intake, starter and alternator for repairs. After assembly it started up and ran fine, th...
2002 GMC Savana 2500 5.7L Monitor Status VIN: 1GTGG25R12
Van Came In For Smog At A Friends Shop Failed Due To No Monitors Complete But If You Check With OBD II It Gives Option Of Two ECMs To Check $10 Or $17 (Engine) I Have Seen This Only With ECM And TCM The Van Has A Factory CNG Conversion On It And The Smog Machi...
2003 GMC Envoy SLE 4.2L MIL Lamp on VIN: 1GKDT73SX3
Hi all, got this GMC in with a repeat mil. Comes on after a couple trips. Replaced the sensor to no avail. Pressures all ok on scan tool. Voltages at sensor all ok. Missing something here, need help. Trouble codes: P0105, P0107

Fixes & Summaries for GM
Fix/Summary Answers
1959 Cadillac DeVille 6.4L drums
removed front drums and found one of the pistons siezed in wheel cylander thanks for all the advice should have been replaced when shoes were put on
2004 Cadillac CTS V 5.7L Front wheels, front end VIN: 1G6DN57S84
Thank you EVERYONE! All of you guys who suspected the tires, were correct. I finally got the time to experiment, when the vibration was present. After moving tires around, I was able to isolate it to the left front. I tried one thing before condeming the t...
1994 Chevrolet K2500 5.7L 1-2 Shift VIN: 1GCHK24K4R
fixed with with knock sensor being rewired. thanks to all that helped. never would have known that this would make trans do full line pressure.
1995 Chevrolet C1500 Cheyenne 5.7L trans.pump seal VIN: 1GCCS19WOT
Replaced Pump & Converter Converter hub measured over 015. I had never measured flexplate until last week.Thanks everybody for the input.
1998 Chevrolet K2500 Silverado 7.4L cylinder wear
The root cause for three failures cannot be linked with certainty. The engine was removed and disassembled. AL [...] cylinders have 100% of the cross-hatch worn completely off, the metal has darkened considerably. The worst cylinder miked out with .017 wear. Th...
2003 Chevrolet Suburban 1500 LT 5.3L Will not shut off VIN: 3GNFK16Z53
Sorry for taking so long to close, I was in the middle of a 6.0 diesel no start at the same time. Whoever said fuse box had it right, smelled like mouse urine and burnt electrical, when we found it in stock at the dealer we went for it. THANKS TO ALL THAT TOOK...
2005 Chevrolet Express 2500 4.8L Temperature gage VIN: 1GCGG25V75
Well I went out the next day and it has worked since I still want to know if the info from the pcm is not getting to the icp since I can operate the gage when it is not reading the corect temp but since the temp is correct since I dont knwo what is bad it was ...
2006 Chevrolet Malibu LS 2.2L Cooling Systems VIN: 1G1ZT51F66
We sent the head out for pressure testing, they said there are no cracks but is warped. They resurfaced and we re installed. Same thing again water in the oil. Then we put dye into the head where the top hose connects. then pressure tested again. We found 2 cr...
2007 Chevrolet C5500 Kodiak C5C042 6.6L Misfire, MIL Lamp on, low power VIN: 1GBE5C1247
Good Morning to all the great IATN techs out there! Sorry I'v been so long getting back on this one. We didn't find anything conclusive on our first try at this truck a couple weeks ago, so they decided to run it awhile and see what happens, which ended up bei... Trouble codes: P2146 (Injector positive volts Group 1 14 cylinders).
2002 GMC Sierra 2500 HD SL 6.6L Poor Idle Quality, Surge VIN: 1GTHK231X2
it seems my friend decided not to buy this vehicle so I don't know if it has a problem with injectors or not. most replies said these had problems with injectors.
2005 GMC Envoy SLT 4.2L 1-2 Shift VIN: 1GKDT13S05
Finally got back to the Envoy. Got a pressure gauge hooked up and yes the pressures were high as heck (as another fella put it). About 250 PSI with light to medium throttle. Replaced the EPC solenoid and she shifts like a dream. Thanks for all the replies. It...
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