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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for March 14, 2011
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Open Help Requests for GM
Help Request Answers
2005 Buick LeSabre Custom 3.8L Poor Idle Quality, Stall VIN: 1G4HP52K55
This vehicle was put on IATN previously and I have done considerable testing to locate the source of this issue. When the issue returns, it seems to have a different set of problems. It also seems to be a matter of the trouble does not occur on a regular basis...
1994 Cadillac Seville STS 4.6L cooling system VIN: 1G6KY5293T
Hey guys, we got this cadillac in here with some history. The car would intermitantly overheat but not a constant condition. The customer didn't want to address this issue because it would only do it driving and going up hills. About two weeks ago we changed t...
2000 Cadillac Catera 3.0L No Start, Stall VIN: W06VR54R0Y
This Cadi came in on the back of a tow truck, customer said it was running and just stalled out of the blue. After several minutes it restarted. It began doing it more and more till one day it wouldn't start. After replacing the battery we found that it would ...
2007 Cadillac CTS 3.6L Hesitation, Surge, Misfire VIN: 1G6DP57757
We have a 2007 Cadillac CTC 3.6L v-6 that fels like it has an ignition misfire. You can duplicate the problem by driving up a slight incline with steady throttle pressure. It seems to do it best at 50mph, but does it almost any gear with just enought throttle ...
1989 Chevrolet Beretta 2.0L MIL Lamp on, high idle VIN: 1G1LV1419A
Vehicle came in for high idle (1100-1200rpm) and check engine light coming on. Found code 15 for coolant temp sensor. Checked on scanner and temp sensor reads -39 degrees. Installed new temp sensor and that problem is fixed. Still have a high idle and customer... Trouble codes: 15 (Coolant temp sensor fault)
1995 Chevrolet K2500 Suburban 7.4L Excessive Emissions VIN: 1GNGK26N7S
Truck is failing for nox, customer replaced cat and o2. Found ecm only pulling pwm ground to 6 or 7 volts at cruise and full throttle, dont know if this enough or right.fully grounded the ecm wire and truck still idles, pulled off the egr and started vehicle...
2000 Chevrolet School Bus Chassis B7T042 7.4L No Start, part time no start VIN: 1GBL7T100Y
The problem is that about 30% of the time the engine will crank but not start. The rest of the time, it starts immediately. If it cranks and doesn't start right away, it won't start no matter how long you crank, until you stop cranking and try it again. Then i...
2001 Chevrolet W3500 Tiltmaster W3S042 5.7L No Start VIN: 4KDB4B1R11
Has anyone ever heard of anything like this. I am trying to help someone out and they do not have IATN, if I can figure it out then I will get the job.
2003 Chevrolet Silverado 1500 HD LS 6.0L Hesitation, Surge VIN: 1GCGK13U13
Hi to all .. I have a puzzler here. Replaced throttle body and pigtail connector couple weeks ago due to surge under light to moderate accel and had 2 thr pos. codes. Codes have not returned, however after a week to 10 days, surge is back. Feels like gas pedal...
2004 Chevrolet Silverado 2500 HD 8.1L Speedometer VIN: 1GCHK23G14
Greetings! Speedometer is reading erratically low - sometimes almost zero - when going down the road. Can read out speed on scan tool - no problem. Is there anything I should be checking other than condemning the speedo? Also, any recommendations for a repair ...
1997 GMC Jimmy SLT 4.3L Turn signals/Fuel gauge VIN: 1GKDT13W5V
Hi all. It seems when it rains it pours. Okay, The customer brought in this vehicle with a complaint that the turn signals stopped working all at once, that is it would not work right or left, but the emergency flashers worked all bulbs just fine. (there are ...
2008 Saturn Vue XR 3.6L MIL Lamp on VIN: 3GSC153788
We have a fairly new saturn here that keeps setting this P0449 code. I am able to command the vent solenoid with the scan tool and have verified power and ground. Does anyone know where there might be a good place to look for a intermitent open or short. Have ... Trouble codes: P0449 (Vent solenoid circuit problem)

Fixes & Summaries for GM
Fix/Summary Answers
2002 Chevrolet Silverado 1500 LT 5.3L charge indicator VIN: 1GCEK19T22
Alternator replacement took care of it! THANKS for all the help!
2006 Chevrolet Impala LS 3.5L abs VIN: 2G1WB58K66
I don't think anyone here will believe this but the problem is now fixed. I waited a bit before posting here but the answer was low brake fluid. The car came back for us to check wheel speed sensors readings but all wheels measured equally when spun on the lif...
1995 GMC K3500 Sierra SL 5.7L Cuts out, Misfire, MIL Lamp on VIN: 2GTFK29K15
I have not been able to return to work on this vehicle. When i have repaired it i will post. Thank you to all who have replied to mt help posting. Matt Trouble codes: 42 (IC control error).
2002 GMC Envoy SLT 4.2L Fuel Gauge, Oil Gauge VIN: 1GKDT13S42
A lot of you recommended replacing the ignition switch. We replaced the ignition switch with no luck, the same problem. We also found that this vehicle had a recall on the wiring for the suspension. The vehicle had the recall done in 2004, and the same problem...
1962 Oldsmobile Starfire 6.5L a/c VIN: 626CO3654A
Thanks for the help, we got this car fixed by using Alldata library , I did not know that that service was available, I know now and thanks again.
1997 Oldsmobile LSS 3.8L No Start, Poor Idle Quality, Stall, Poor Fuel Economy VIN: 1G3HY52K4V
Thanks everyone for all the good advice.Michael from Pennsylvania hit the nail on the head.We retested the fuel coming out of the cyls. & sure enough, it was a mixture of fuel & water. We should have given the sample time to settle out.The oil was also mislead... Trouble codes: P0300.
2003 Pontiac Vibe 1.8L Misfire, MIL Lamp on VIN: 5Y25M628X3
thank s for the help. It did turn out to be a faulty PCM, thanks for the help, we kept missing that. A new one fixed the car agin thanks Trouble codes: P0303, P0304, P0302, P0420 (cat eff. b1 below threshold both times in).
2005 Pontiac Grand Prix 3.8L Traction Control VIN: 2G2W952285
Well, the customer never came back. I appreciate all the help. Thank you. I believe possibly there was a problem with one of the sensors but without the car back in I can not be certain. Thank you again for your replies.
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