× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 14, 2010
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Open Help Requests for GM
Help Request Answers
1993 Cadillac DeVille 4.9L Power Door Lockd VIN: 1G6CD53B0P
CADI TECHS, i have a 93 cadi deville that the door locks work only some of the time.I already have replaced the door lock controller.The locks will work right when you first start the car,after about 10-15 min is when the problem start.The locks with become in...
2003 Cadillac CTS 3.2L Poor Idle Quality, MIL Lamp on VIN: 1G6DM57N23
Hello fellow Tech's, I have P0221 Throttle position sensor condition. This is an intermittent condition only happened once before. Flow chart lead me to intermittent Diag. and I found nothing. TSB shows very little help. Thanks for ANY help. Trouble codes: P0221 (Throttle posion sensor)
2004 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD54Y64
Vehicle had codes for all three O2 sensor heater circuits. B2S1 sensor heater element was open. Replaced the sensor. Cleared PCM. All three codes came back. O2 heater fuse is good. Checked ciruits for continuity. They check out good. Load tested circuits with ... Trouble codes: P0135 (p0141-), P0141 (p0155-), P0155 (p0130-), P0130 (p0150-), P0150
1964 Chevrolet Bel Air 3.8L engine swap VIN: 21569J1997
Anyone done a V8 conversion on one of these? Customer brought semi stripped car in and wants to take out the straight six and install a strong V8. It has the powerglide with cooler lines. i checked online but haven't turned up much for swap kits. Everything un...
1991 Chevrolet Caprice 5.0L extended crank ? VIN: 1G1BN53E0M
owner says starts hard I'm not sure what is normal crank time.My 88 plow truck is about the same.fuel pressure comes right up koeo.Might just put a relay in but I'm not sure there is a problem to start with.Runs fine other than the crank time. Thanks for any r...
1996 Chevrolet Tahoe LT 5.7L shift points, transmission VIN: 1GNEK18K5S
Customer brought his truck into us after two Aamco's messed it up. When driving under moderate/ heavy throttle the shift points are well into the red at 4500 or 4600 RPM. Figured we'd check TPS performance and found no 5v ref at the TPS or MAP sensors. Wires a...
2001 Chevrolet Silverado 2500 HD 6.0L air bag VIN: 1GCHK24U91
hello all we have a customers work truck with the air bag light on and no comm with air bag module. i have power and ground to module and .5 ohms from data out to dlc pin #16. have tried two used modules and one known good one from another truck and still ligh...
2004 Chevrolet Silverado 1500 4.8L Readiness Monitors VIN: 2GCEK19V94
Hello fellow Techs, Got a head scratcher here. All I/M readiness monitors reset on their own as soon as the key is cycled OFF to ON. Since PA is an Emmissions State, this truck won't pass the OBDII portion of the test. As I shortly found out that this vehicle...
2006 Chevrolet Silverado 2500 HD LS 6.0L MIL Lamp on, reduced engine power VIN: 1GCHK24U56
we have replaced everything that has to do with the tac system. we have been fightin this problem for a long time. it sets the codes/code at random times. sometimes it will just set the code u0107. just started to set the p2108 and p1516 but the u0107 sets eve... Trouble codes: P1516, P2108, U0107
2001 GMC Sonoma SLS 4.3L Won't shif out of 1st VIN: 1GTDT19W21
Changed the speed sensor. Then it would work intermittently. Replaced the wiring harness from sensor to ECM vehicle worked for a 10 mi test drive and we sent him home in it. The vehicle came back the next day saying he did not make it to his home before it sta...
2008 GMC Acadia SLT 3.6L Hvac System VIN: 1GKER13788
This one came into me in august, service drive managers wife's truck. Seems to blow warm at times. Looks like they have replaced the exspansion valve already. I tested it yesterday morning and found the outlet temp from center vents to be about 55 degress, out...
2001 Oldsmobile Bravada 4.3L Starting VIN: 1GHDT13W21
First off, thank you for your time to help us out! We got this Bravada in with an intermittent starting issue. I jumped in it, and it started right up. I waited 15 minutes, and tried to start it, and it wouldn't start. To explain what I mean by "no starting...
2003 Saturn L300 3.0L compressor VIN: 1G8JW54R83
A/C in-op. Half the time you can start the engine and the AC control head will be fully lit up and un responsive. This car does have ATC. When the control is all lit up, you have no blower, no compressor, no buttons work. Now the other half the control will co...

Fixes & Summaries for GM
Fix/Summary Answers
2003 Cadillac Escalade 6.0L air ride control VIN: 1GYEK63NO3
thanks to all who replies good inf.this truck came from another shop for suppost electrical problems.all sensor and actuators working good.gave back to shop told it it was not electrical problem. suggest him to install oe shock and try it.he refunded mony to c...
1987 Chevrolet R10 Silverado 5.0L Poor Idle Quality, Stall VIN: 1GCEV14H7H
Well I installed new alternator with no change, checked for internal and external vacumm leaks found none. I could not fine why it was lean, Finally figured out that they had installed a 5.7 engine in truck and I had put the 5.0 injecter in TBI unit. I replace...
1993 Chevrolet K1500 Silverado 5.7L steering VIN: 1GCEK19R3V
Thanks to all whom replied! The problem was the EVO actuator on the back of the power steering pump. Of course GM has discotinued this item. However, they do have a fitting available that replaces the actuator. It can be installed without removing the pump...
1995 Chevrolet C1500 5.0L Hesitation, Cuts out, Stall VIN: 1GCEC14HXS
thanks to all for help.my backpressure gauge must be inop.i show 0 backpressure but i ran truck with 02 sensor out truck runs fine.going to replace cat and all should be well.
2005 Chevrolet Cobalt LS 2.2L struts VIN: 1G1AL52F25
i put new strut bearing on old ones were new too thanks to everone jim
1988 GMC S15 2.5L Starting VIN: 1GT8S14EJ8
Well, what ultimately fixed this vehicle was replacing a fuel injector. Contrary to what the book said, this one was out of specs. Thanks for all the great advise and help.
2003 GMC Sierra 1500 SLT 5.3L No Start, MIL Lamp on VIN: 2GTEC19T23
thanks jay & david both for your quick replies,jay i was in a hurry posting fri.afternoon & didn't mention having a booster pack on truck during programming & truck also had new battery,thanks for the reminder though.david truck didn't have any aftermarket dev...
2001 Oldsmobile Silhouette GL 3.4L No Start, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1GHDX13E61
it was a bad bosch o2 sensor keept reading 0-4 mv replace it with denso sensor got 300-400 mv i hate bosch car runs great thanks guys Trouble codes: P0128, P0131, P0135, P0300, P0171.
2001 Pontiac Sunfire GT 2.2L compressor VIN: 123J532451
Thanks for the help. It turns out that the new compressor must have had a bad regulator valve. When i opened the system back up the orifice tube had metal on the inlet screen. The original 9 year old compressor did not have this much debris in the system so t...
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next