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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 28, 2007
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Open Help Requests for GM
Help Request Answers
2000 Buick Century Custom 3.1L air bag VIN: 2G4WS52J8Y
hey all. i got a code b0026 frontal loop open. any ideas on what it could be or where to start at. car is in great shape.never been wrecked as far as i can tell.
1993 Cadillac Eldorado 4.9L light ride control VIN: 1G6EL12B3P
HI Y'ALL!!! I have a real headache with this 93 eldorado. The service ride control light keeps flashing and I am chasing my tail now. The only code that I can find is I039 in the IPC section. That leads me to the speed sensitive suspension module in the trunk....
1997 Cadillac DeVille 4.6L Excessive Emissions, No Start VIN: 1G6KD52Y9V
After vehicle set overnight had very long crank (30 seconds plus) Customer says is a new problem. We have verified symptom, but only occurs when engine is cold. After finaly starts and o2 sensors kick in the short term fuel trim goes -30 and starts counting do...
1997 Cadillac DeVille 4.6L hard start VIN: 1G6KD52Y8V
hello everyone.vehicle was brought in for hard starting.customer only drives car a few miles per week.check basics first.check archives and found similar problems.started with fuel press. reg.also ran vehicle using motorvac.still has prob.replaced both crank s...
2001 Cadillac Seville SLS 4.6L Instrument clus VIN: 1G6KS54Y91
Just looking to see if I missed something it does not make any sense. We aligned this car yesterday and no lights. After the detail was down and battery died now thwe lights are on. Did not jump start,body shop charged battery for 1.5 hours then fired car. Sca...
1985 Chevrolet Astro 2.5L No Start VIN: 1GCCM15E2F
hello, we have this 85 astro van with no injector pulse. we get good fuel pressure to the throttle body .there is 12 volts on one side of the injector but nothing on the other. checked wiring back to the ecm and it looks good.tried a new ecm, oil sending unit,...
1994 Chevrolet K3500 Cheyenne 7.4L Hesitation, Surge, Cuts out VIN: 1GCHK33N1R
Hello everybody, Got one munching my butt here. This truck has been acting up for about a year and a half now and the problem isn't getting much worse, but definitely not getting better. It's the owner's truck and I'd like to fix it and get him off my back. ...
1996 Chevrolet S10 2.2L No power VIN: 1GCCS1443T
I have this little red S10 that I think that the timing chain or tensioner is out.This truck has no power will not pull its self.Like plugged exuast but not.It has 9in of running vacum and it sounds like the front of the engine is going to come apart.I did che... Trouble codes: P0342
1997 Chevrolet Tahoe LS 5.7L Temp.door motor VIN: 1GNEK13R4V
I have this tahoe w/no heat.I have flow thru heater core,problem appears to be either temp. door or actuator motor for temp.door.alldata says to roll instrument panel forward to access actuator motor for temp.door.Has anyone been into one of these before?are t...
1998 Chevrolet Lumina 3.1L MIL Lamp on VIN: 2G1WL52M2W
Does anyone know the amount of vacuum change the PCM is looking for during the EGR test? Trouble codes: P0401 (insufficent egr flow)
1999 Chevrolet Cavalier 2.2L Hesitation, Surge, MIL Lamp on VIN: 3G1JC5244X
this one has us stumped. Originally believed we started off with just a vacuum leak at the intake manifold gasket, was able to spray carb cleaner at corner off manifold and change o2/fuel trim reading. But still running lean after repair. We can drip carb clea... Trouble codes: P0171
2000 Chevrolet Malibu LS 3.1L Valve Train VIN: 1G1NE52J7Y
Customer has come into shop with a persisting valve noise. Lifters were replaced at another shop recently in an attempt to solve issue. Oil pump was also replaced at the same time for the same reason (possible low oil pressure considered to be the issue). Ther...
2002 Chevrolet Impala LS 3.8L transmission VIN: 2G1WH55K22
Vehicle surges from 40 to 70 mph under light accleration.Checked for service codes and have found none.Checked sensor data on scantool and found the mass air flow,map,ignition timing,and egr systems fluctuate with surging.Have replaced mass air flow,and thrott...
2003 Chevrolet Silverado 2500 HD 6.6L engine VIN: 1GTHK29163
hello everyone i was doing a job were i changed the fuel filter on this truck i changed all gaskets provided in the kit the truck started and all was well i let it run 5 minutes the customer came to get it and stated (after hours) "the truck started to rev up ...
2003 Chevrolet Impala 3.4L Cooling Systems VIN: 2G1WF52E63
customer brought in vehicle complaing of overheating checked fuses found blown fuse for fan cont 1 replaced fuse fan turn on low speed and other fan turns on high but fuse for fan 1 blows after a few mins ran diag found code p0480 for cooling fan 1 control ckt...
2003 Chevrolet Malibu 3.1L harsh upshift VIN: 1G1ND52J43
Vehicle came in with harsh 1-2 upshift. No codes were present. Trans fluid was full. Flushed trans with no luck. Tested Pressure Control solenoid, was about 5-10 psi low across the board. Removed valve body to replace PC solenoid. Found an isolator spring miss...
2004 Chevrolet C5500 Kodiak C5C042 6.6L No Start VIN: 1GBE5C12X4
I need help with this Chevrolet truck. It's a Kodiac C5500 with a 6.6 diesel(LLY) that will NOT start below 40 degrees F (Customer says he can get it started using starting fluid)Truck came in as a no-start when cold. I found fuel leaking out of fuel filter, a...
1997 GMC Sonoma SL 4.3L Heater VIN: 1GTC319X1V
Hey guys i have this sonoma that at times when you start the truck the abs light goes on and the heater does not work but when you shut the truck off and restart everything works fine please help
2002 GMC Sonoma SL 4.3L heater VIN: 1G5CS19W62
2003 GMC Yukon XL 1500 Denali 6.0L Suspension VIN: 1GKFK66U73
Customer bought vehicle and every couple weeks the brakes will all of a sudden apply on their own and bring it to a complete stop with the stability light coming on. I found the bulitan on wires rubbing on the drivers power seat and they were, and I had a code...
2003 GMC Envoy XL SLE 4.2L Hesitation, Surge, Cuts out VIN: 1GKET16573
Hello all again, I'm desperate this time(as always I guess). This envoy very intermittently acts up and when it does there is no response from the throttle pedal (engine just idles) and the (I believe it to be) low power light comes on. This can be corrected i... Trouble codes: P0495 (Cooling fan speed high), P0172 (System rich Bank 1), P0705 (Trans Range Circuit), P1221 (TPS Performance/Fuel Pump Circuit), P1271 (APP Sensor 1-2 correlation error), P1523 (Electric throttle control throttle return)
1985 Pontiac J2000 Sunbird 1.8L Thermostat housing VIN: 1C2JC6702F
This vehicle has the "typical" rusted thermostat housing. I have been unable to locate a replacement. OEM part number [...], was discontinued last year. No listing in the aftrmarket, that I can find. Would also like to find a timing belt cover OEM number 10...
1998 Pontiac Sunfire SE 2.2L ABS Module, ETS Light, Air Bag Light... VIN: 1G2JB5241W
Hi iATN techs, hope that some of you can help me out with this problem. Customer complaint is ABS light on. ABS light comes on intermittently. When I intially scanned for fault codes I had no communication with the ABS module & the ABS light was off. ETS light...
2001 Pontiac Grand Am SE 2.4L No Start, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1G2NF52T81
We have a problem child grand am here. Came in 2 months/2k prior for running poor, miss. miss was #1,#3 cylinders, found burnt coil housing. replace 2 coils, housing, spark plug boots, and spark plugs. Vehicle was back 1 month/1k ago for died on road, replaced... Trouble codes: P0336 (crank sensor), P0300 (miss does not show up on data screen)
2003 Pontiac Grand Am GT 3.4L all dash waring lights VIN: 1G2NW12E93
Hey folks I need HELP. Have an 03 grand am gt while driving the abs, brake, trac off, warning lights come on and the battery goes dead. Has new battery. I have replaced the alt 3 times (all same day) can not get over 12.5 volts charging. The orginal alt had ba...
2002 Saturn L200 2.2L heat & overheat VIN: 1G8JU54F82
We need some help from the Saturn people. As far as the cooling system is concerned, there were no problems until 11/26/2007. There was no heat and it started to overheat. The car was last driven 11/24/2007 with no problems. We changed the thermostat again wit...
2003 Saturn L300 3.0L hard start VIN: 1G8JU52F11
after we replaced the fuel pump .with a gm pump the customer told us that he has a really hard time starting the car after fueling .We have taken the tank back out and replaced the pump with a air tex pump.same thing has anyone seen this befor?
2006 Saturn Ion-2 2.2L battery VIN: 1G8AZ55F96
thanks to all in advance... i have a 06 ion in the shop. customer states that vehicle battery goes dead after sitting over-night. performed battery/starting/charging system tests using [...]: normal. allowed vehicle to sit over night. checked battery:12.45V...

Fixes & Summaries for GM
Fix/Summary Answers
2003 Buick Regal LS 3.8L security lamp VIN: 2G4WB52K03
Thanks to all for the prompt replys, it's been a while as the customer needed to re-appoint time back in the shop. This is a noteable post as very few of us seemed to have a handle on it. Andy Mcginnes suggested we leave the car on for a while to allow the key...
1998 Chevrolet Corvette 5.7L ABS module VIN: 1G1YY32G5W
The final fix, I replaced the entire ABS control unit from a wrecking yard. The EBTCM was bad and it was unable to display codes from the malfunctioning unit. Replaced the entire unit, module and Hydralic control unit. Car is fixed.
2001 Chevrolet Silverado 2500 HD 6.6L Surge VIN: 1GCHK23161
replaced fpr unit runs fine now no reason why the origional gm one quit working but dealer refused to warranty the part i bought 1 week prior
2003 Chevrolet Trailblazer North Face 4.2L rear wiper VIN: 1GNDT13S93
Trace problem to main 12 volt feed wire where hatch opens , and it was broke in body part of vehicle.this wire was orange in color.
2005 Chevrolet Astro 4.3L 3rd gear VIN: 1GCDM19X05
Thank you to everyone. Customer has decided to put in an new trans so it will be fixed regardless. I would like to thank ALL the techs on IATN. We use it as part of our standard diagnostics to see if someone has had a similar problem on a certain vehicle. Usua...
2000 GMC Yukon XL 2500 SLE 6.0L door locks VIN: 2GKGK26UXY
Thanks to iATN and all that replied, Dan from Missouri hit the nail on the head. In the end there was a problem with the rear switch. For some reason the door locks wiring from the front doors come into the fuse block from the front while the single wire from...
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