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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for August 15, 2007
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Open Help Requests for GM
Help Request Answers
2001 Buick Century Limited 3.1L fuel gauge VIN: 2G4WY55J41
The cluster is doing weird things. Fuel gauage is erratic, warning lighs of all sorts are coming on. brake, abs, tcs,mil. Have checked the wiring harness nearthe acc. and checked the computer for codes. none. also ck the relay box for bad terminals. Checked fo...
1999 Cadillac DeVille Concours 4.6L compressor relay VIN: 1G6KF5496X
hello all thanks for ypur time this cadillac losses power to the control side of the relay,sometimes, well i have checked for voltage drop between the relay and ignition switch all seems okay but the ac works after the test, i definatly do not have power when ...
1999 Cadillac Seville STS 4.6L Stall VIN: 1G6KY5499X
Hello fellow technicians I hope there is a cadillac tech out there who has come across this problem before. I have this Cadillac STS that intermittedly dies mostly when warm, after driving on freeway, when coming to stop. It starts right up and there are no co...
1995 Chevrolet C2500 Cheyenne 5.7L Starting VIN: 1GCGC29K8S
Customer brought in truck because starter seemed to be drawing too much amperage. We replaced starter(warranty exchange). Problem still persists but now no crank/no start. Replaced ignition switch, same problem. Checked fuses all are fine. Battery good includi...
1997 Chevrolet Venture 3.4L Hesitation, Misfire, Trim VIN: 1GNDX06E3V
Got a tough one here. Vehicle originally came to shop with customer reporting an intermittent cold start hesitation that would go away after a minute or two of driving. Inspected engine for obvious problem and none evident. Scanned ECM and one code stored for ...
1998 Chevrolet S10 2.2L Brake lights VIN: 1GCCS1444W
The customer brought the truck in with the brake lights both on. The cab brake light not on. I removed the brake light switch and unplugged it however the lights stayed on. I pulled the fuse and they went out. This is a well maintained truck with no trailer wi...
1999 Chevrolet Monte Carlo LS 3.1L Starting VIN: 2G1WW12M7X
Hey all have this monte carlo the customer says it died while driving. It cranks over for 1 second then the starter kicks outs. It asks like the stater is weak to engage and and when it hits compression it kicks out. I remember seeing something like this a lon...
1999 Chevrolet C2500 5.7L lack of power VIN: 1GCGC24R0X
we got this truck in from the city, customer stated he was having problems with the transmission, test drove vehicle, under normal driving vehicle runs great but if you smash the gas pedal down engine boggs down, returned to shop and tried same thing, if you i...
2002 Chevrolet Trailblazer LS 4.2L engine VIN: 1GNDT13SX2
Vehicle shows kind of rattling noise coming from engine However, is present at all times but more noticeable when cold and it fades away as long the engine warms up when engine is hot the noise comes when engine is under load. It seems like lifter noise if hea...
2003 Chevrolet Tahoe LT 5.3L drivers seat VIN: 1GNEK13Z63
hello i am testing the drivers seat on this tahoe and going by the flow chart in all data it says to communicate with various modules including the drivers seat and drivers door i am using auto ingunity to do this because we do not have a tech 2 from what i ca...
1987 GMC P3500 Value Van 5.7L not known VIN: 1GDHP32K8H
This truck was towed in a week ago not moving. Slipped in forward, locked up in reverse. Been a long time since I built a TH400. Found burnt forward clutch & burnt up planetarys. Installed full kit, planets, convertor, filter & modulator. Drove 10 miles, worke...
1996 GMC C3500 HD 7.4L timing VIN: 1GBKC34J8T
Hi everyone, I got a slight problem. A simple tune up has turned into a nightmare. Trying to remove the distributor cap, I broke one of those screws. I had to remove the distributor shaft to remove the broken screw and it took some time to remove it. Getting l...
2005 Hummer H2 6.0L Mode Door VIN: 5GRGN22U25
I am looking for some additional information for this Hummer. The air will blow out of the correct, selected location I.E the vents, for about 15 seconds or so and then it may switch to the floor or to the defrost. Please note that the airflow changes not the ...
1997 Pontiac Grand Prix SE 3.8L compressor VIN: 1G2WJ52KXV
Car came in today from another shop. After 3 compressor replacements they gave up. I completely flushed the system replaced condenser and dryer. Installed new compressor with proper oil in system. Before I get burned can someone out there tell me if there is a...

Fixes & Summaries for GM
Fix/Summary Answers
1989 Cadillac DeVille 4.5L compressor relay VIN: 1G6CD5152K
We have checked back all the way to the BCM. Looks like its blowing the relay or not sending the proper signals. Ill keep you posted. Waiting for new BCM.
1994 Cadillac Seville SLS 4.6L blower motor VIN: 1G6KS52Y1R
thanks to all 6 that replied. the fix wae indeed the blower motor. pricey blower motor. iatn is great.
2005 Cadillac DeVille 4.6L HVAC, trunk release VIN: 1G6KD54Y75
The Insterment Panel Control Module (HVAC control unit) was faulty. I carfully checked all the power, ground and CAN connections before condemning it. Made sure to check the CAN with the module unplugged too so that I could ensure there was not an open in the ...
1995 Chevrolet Astro 4.3L injectors VIN: 1GCDM19W2S
thank you for all the help. what i thought was the injector was actually the manifold tuning valve. after i found the colour of the injector wires i was able to determine i did in fact have pulse at the injector. next i brought the engine up on compression in...
1997 Chevrolet K1500 5.0L Misfire VIN: 1GCEK14M1V
First, thanks to everyone who replied many good ideas there. The fix was the intake gasket. However, I still find it disturbing that I couldn't prove it with the smoke machine or propane. After talking it over with the customer we decided to give it a shot s... Trouble codes: P0300 (Random or multiple cylinder missfire).
1998 Chevrolet Malibu 2.4L battery light VIN: 1G1ND52TLW
Thank you all for the replies. The conclusion is that most aftermarket rebuilt alternators lack a regulator capable of supplying the correct information to the PCM to address the charge light. Most said a GM reman would likely solve the problem. Everything is ...
2001 Chevrolet Silverado 1500 4.3L MIL Lamp on VIN: 2GCEC19W41
The customer has not yet returned with the vehicle. There is an overwhelming indication to replace the distributor assembly. As soon as we get the truck back and some time on it will let you know. Thanks for all the replies Trouble codes: P0341.
2001 Chevrolet Cavalier 2.2L cooling fan VIN: 1GIJC52441
well, most of you werer right. Car was in the accident, battery acid has damaged main wireing harness that goes to the fuse/relay box. Needs new wireing:) Thank You all
2001 Chevrolet Tahoe 5.3L 4 wheel drive VIN: 1GNEK13T11
Home run on the G102. Even though all of the ground circuits checked O.K., I looked into Stephens advice on the G102. I took the terminal off the block and found small corrosion at the crimp. I stripped back the wire and found even more. I cut the wire until t...
2004 Chevrolet Silverado 1500 5.3L system pressure VIN: 2GCEK19T54
Thanks go out to each and everyone of you who took the time to address my help request. To those of you that told me to check "air flow", kudos...I had a bad fan clutch. The thing I couldn't understand is why my temperture gauge did not show an increase in tem...
2006 Chevrolet Malibu LT 3.5L engine VIN: 1G1ZT51846
thanks to all of you guys that replied, i have already make an estimate to insurance using the information that you give me
1998 GMC K1500 Sierra SL 5.0L ABS Controller VIN: 2GTEK19MOW
Thank you for the assistance and sorry about the late reply, The problem turned out to be the left front hub/bearing assembly that I installed earlier being defective. It tested as being ok as per advice that I recieved and it read the same mph as the rt.ft. a...
1999 GMC C1500 Suburban 5.7L Hesitation, Surge, Cuts out VIN: 3GKEC16ROX
well i finally fixed this one. apperently the transmission shares drivers with the injectors somehow, and thats why it was causing it to lose injector pulse, but the trans solenoids were apperently the cause, Repleced the trans and now runs great, Thanks to M...
1994 Pontiac Bonneville SE 3.8L Tcc,overdrive VIN: 1G2HX52L4R
Was finally able to watch tcc slip rpm when problem happens went above 150!!! recommended tcc replacement to customer he did not want to spend the money to repair at this time.thanks for the help (sorry it took so long to post)
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