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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 24, 2009
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
1997 Buick Park Avenue Ultra 3.8L No Start VIN: 1G4CU5217V
Fuel tank contaminated with water, mud. Fuel pump retaining ring rusted off of tank, along with the top of the tank, allowing pump to come loose and allow the contamination. Unable to retain new pump assembly with rusted out top of tank. Fuel tank no longer av...
2001 Buick Century Custom 3.1L MIL Lamp on VIN: 2G4WS52J01
po401 po404 can not seem to lacate problem need to get this car through inspection. Has anyone seen this problem before? please help this a good customer and a nice lady Trouble codes: P0401, P0404
1991 Chevrolet Camaro Z28 5.7L Poor Idle Quality, Hesitation, Surge, Stall VIN: 1G1FP2380M
well guy, i got everyone elses problem. this car came to me with a surge at idle, and a hesitaion at cruizing speed. it seems everyone else has had a go at this car, apperently throwing parts at it. (new iac, map, tps, computer, o2 sensor, plugs, wires, we did... Trouble codes: 33 (map), 34 (map)
1995 Chevrolet K1500 Silverado 5.7L down shift, 3 & 4 gear VIN: 2GCEK19K6S
Guys and Gals, I am pulling out my hair on this one. This truck is mine. I've had it virtually forever. Recently, I decided to upgrade the engine and had one built by KNICO engines. Nothing radical. RV cam, flat tops pistons, roller rockers, headers, intake. N...
1997 Chevrolet Malibu 2.4L Horn VIN: 1G1ND52T3V
GM techs please help, before I pull my hair out. Got this vehicle with dead battery. Tested and replaced battery. Charging system ok ([...]@71a) (.013a draw). Now with the vehicle in gear(RND321) the horn honks all the time. All fuses good. Swap ho...
1998 Chevrolet Malibu 2.4L antitheft VIN: 1G1ND52T7W
Hello I have this 98 Malibu with a 2.4l that came in with an intermittent no-start. I checked codes and it had a P1630, 1631 and 1632 antitheft codes. I could not get into the BCM on this model with my modis for some reason, which is strange it did not show B...
1998 Chevrolet Tahoe 5.7L passlock VIN: 1GNEC13R7X
Vehicle came in on a hook, The customer does not speak good english so there is a slight comunication gap. I can understand most of him, but some of the details of the time of the incodent are a little foggy. Heres the problem, customer had put a 24volt batter...
1998 Chevrolet Cavalier 2.2L MIL Lamp on VIN: 1G1JC5240W
We have this 1998 Caviler that is kicking our buts. Intermittently sets TPS codes. PO121 and 122. When this happens the customer says the transmission shifts hard or bangs into gear. This has been going on for over a year now but has never given us a problem. ... Trouble codes: P0122, P0121
1999 Chevrolet Silverado 1500 LS 5.3L Front Pinion seal VIN: 2GCEK19T2X
This is my own baby, I only take it out when I make road trips pulling my trailer. I just made a 1400 mile trip over the weekend with it. I thought I could smell oil burning on the exhaust when I gassed it up a couple of times on the way back. Being in truck s...
2000 Chevrolet Blazer LT 4.3L airbag light VIN: 1GNDT13WXY
Used car dealer has had this blazer to several shops. Im lost on this one it has a code (B0022) that will not clear and i just cant get on the right track.Alldata hasnt been much help with this one or im just brain locked ive read till im confused so someone p...
2000 Chevrolet Blazer LS 4.3L Reverse Gear VIN: 1GNDT13WT2
I opened up my free trial 24 hour pit pass to search here on iATN from the knowledge base and there was only one transmission related issue from 1998 to 2004 and had nothing to do with my issue. The Blazer when placed into (1), (2), (3), OR (D) does not make a...
2003 Chevrolet Avalanche 1500 5.3L airbag light on VIN: 3GNEK13T33
Any help with this will be greatly appreciated. [...] thanks
2001 GMC Sonoma SLS 4.3L Misfire, MIL Lamp on VIN: 1GTCS14W01
This GMC shows that there is a misfire on cylinder 4 as soon as the truck is raised off idle. The misfire counter counts rapidly on cylinder 4 above about 1400 rpm, when the engine speed is held steady. It does not count when idling or when revving quickly and... Trouble codes: P0304 (Cylinder 4 misfire)
1999 Oldsmobile Alero GLS 3.4L reserve tank VIN: 1G3NF52E5X
Any help would be greatly appreciated!! This ones going to break me.I purchased this 99 Alero for resale, found out the motor had bottom end knock. Replaced with used engine. Seemed good driving short distance, sold it, car came back leaking antifreeze. Tech ...
2003 Other GM vue 2.2L door locks VIN: 5GZCZ23D43
no body codes, doors continue to lock while driving intermittantly. wiring outside of doors ok.disconnected drivers and passengers lock switches w/same result

Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick Regal GS 3.8L Stall VIN: 2G4WB52K7W
thanks for all the advice, a new switch fixed it. like I had said before I was positive that the switch had failed. I understand electricity and voltage drops, I was just curious why the little bit of extra amperage from the turn signals would cuase a drop tha...
1991 Chevrolet Astro 4.3L fadeing pedal new master VIN: 1GNDM15ZXM
Sorry for the lack of info on this post. The vehicle had a good pedal after test drive and could find any other problems at this time. Thank you for all your replies.
1991 Chevrolet Corvette 5.7L ignition VIN: 8XM5112742
Thank you, to all who replied. As I stated I was posting for a friend of mine who is doing the repair. Since there were many replies I will use the format below to respond. As of now the vehicle is not fixed. My friend is trying to get a resister to match the ...
1995 Chevrolet K1500 Silverado 5.7L Hesitation, Cuts out VIN: 2GTEK19K3S
thanks to all we have fixed this truck turns out that the map sensor had a glitch in it we tried everything known to man and turned out to just be the map.thanks again to everyone. someof you out there did not read the posting and said that was cam gears well ...
1997 Chevrolet K1500 Silverado 5.7L low eng temp VIN: 1GCEK14R6V
Thanks to all who reolied. sending unit was reading low. water pump delivering insuficient flow to left cyl head, causing high temp. in left cyl head (30 to 40 degs. higher) gauge ran 170 deg. (due to bad sending unit) t-stat housing measured 170 deg ecm re...
2003 Chevrolet Astro 4.3L Battery VIN: 1GNDM19X83
Guys, thanks for all the great responses, especially Glen from Illinois who called it right on the nose. The fuselink terminal at the starter solenoid was badly burned. Replaced terminal end and proper voltage returned instantly. Big relief!
2005 Chevrolet Trailblazer LT 4.2L Cuts out, Stall VIN: 1GNDT13S25
Well the truck is fixed. Thanks to Robert, Charlie, Dave, Tim Eric and the others that suggested cleaning the throttle body. I cleaned the throttle body and removed the negative cable from the battery and touched it to the positive post. Started the truck and ...
2006 Chevrolet Uplander 3.5L MIL Lamp on VIN: 1GBDV13L96
hey guys sorry it took me so long to get back with you all but i have been under weather and yes i did fix this vehicle it had to have the ecm replaced due to the driver was shorted to ground,replaced ecm and this took care of the problem and thanks for everyt... Trouble codes: P0449.
1994 GMC Jimmy 4.3L rear defrost VIN: 1GKDT13W1R
Thanks to all that responded. The customer chose not to have this problem fixed. He still owes me for other repairs. The only information that I can add is that the rear lift struts appears to be insulated and power from the relay goes through them to the gri...
1999 GMC K2500 Sierra SL 5.7L prindle switch VIN: 1GTGK24R6X
did line pressure checks all within specs, tried unpluging trans harness still had no gears so i pulled trans pan and found that yes the manual valve had come loose from shifter rod because the castle nut that holds gear selector had come loose fixed all is ha...
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