Join Now
International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for December 30, 2008
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
1998 Buick Regal LS 3.8L Cooling Systems VIN: 2G4WB52K7W
oil in coolant help.
2004 Cadillac CTS 3.6L unable to remove key VIN: 1G6DM57724
This car came in with complaint of unable to remove key, traction light on & door lock problem. I found aftermarket alarm with a mess of wires, removed it & found shorted wires causing door lock problem, so that part is fixed. I could not get any codes due to ...
1986 Chevrolet K20 Custom 5.7L Cuts out VIN: 1CCGK24M0G
Hey guys, This is a really strange one. Truck was towed in for stalling under cruise and accelleration. It idles fine most of the time. It was in about 2 months ago for water in the fuel due to rain getting into the sending unit seal- replaced both items with ...
1986 Chevrolet Cavalier CS 2.0L no power VIN: 1G1JD69P5G
please help timing has changed two times on its own and i cant think of anything but the timing chain jumping. vehicle was in 3 weeks ago and had no power and the exhaust was red hot, found the timing way off. another shop had just replaced pick up coil (had d...
1996 Chevrolet Tahoe 5.7L ignition system VIN: 3GNEK18ROT
This vehicle came in with a no start when it rains. All wires, cap, rotor, and coil has been replaced. There is no codes in the computer. I have checked all grounds and they are clean and tight. Even when we have a big frost or humid morning it will not start ...
1997 Chevrolet K1500 Suburban LS 5.7L Poor Idle Quality, Cuts out VIN: 1GNFK16R0V
Engine on start up was running badly oil pressure gauge spiked high check engine light came on. Customer had codes read at parts store, sold him crank shaft sensor, customer replaced, engine still has poor idle, sluggish etc, oil pressure gauge OK now. We scan... Trouble codes: P1345
1998 Chevrolet Venture 3.4L Excessive Emissions, Cuts out VIN: 1GNDU06E5W
This van came if for tune up because it failed emission on crusie CO 0.53%, HC 97, NOX 2500. I do not have a gas analyzer and dyno, may be i should i let this one go after the tune-up and maintenance service. However on checking scan data i found it showing ...
2001 Chevrolet Venture LS 3.4L Cuts out VIN: YV1TS91D72
This vehicle came to us a month ago on the hook-but as soon as my tech hit the starter, it started. Ran just fine in the shop-took it for a 15 mile test drive-everything was OK. Then the same day, went back and it would not start-NO SPARK-no trouble codes, non...
2002 Chevrolet Venture LS 3.4L Alternator VIN: 1GNDX03E42
The van drove to the shop with multiple dash lights on. The SES light, track light, alternator light and others turned on and off when ever. The alternator output was tested at the battery and found to be 18+volts. The alternator was full fielded all the time....
2002 Chevrolet Tracker 2.0L blower motor/ headlights VIN: 2CCNBJ13C4
This Tracker's blower motor will operate with key off. Off switch will turn it off, but works in all positions. Relay is good. Also, the headlights will not go off. You can hear relays under dash clicking away. Grounds behind both kickpanels are good. Any inpu...
2006 Chevrolet Colorado LT 2.8L Misfire, MIL Lamp on VIN: 1GCDT14896
This is a rural mail carrier truck. On first visit for PO300 I replaced spark plugs and monitored misfires with Tech 2 on the road, all ok. Next day I found the complaint for misfire is at idle speed. When you go down the road the misfire is not present. Mostl... Trouble codes: P0300 (random misfire)
2007 Chevrolet HHR LS 2.2L heater VIN: 3GNDE13D67
Vehicle came in initially for a customer requested coolant flush. Completed flush and customer later complained the original problem was no heat. Still no heat after the flush. Had roughly 178 degrees going into the heater core and about 170ish coming out. Cou...
1994 Pontiac Grand Am SE 2.3L No Start VIN: 1G2NE5538R
This car will not start. It just backfires and kicks back. It is in time. It has good fuel pressure and good spark. Injectors are ok. Checked for codes and there were none. But under data steam we found the CT and MAT to be at 304 degrees. They stayed at this ...
2000 Pontiac Grand Prix GT 3.8L none VIN: 1G2WP12K4Y
Have this po481 code tested coolant fan circuit code for 2 but checked all voltage ground and ref. all circuits work fine no problems with car only engine lite on only thing changed on car was blower motor and temp. control both from dealer code not present un...
1999 Saturn SL2 1.9L abs VIN: 1G8ZK5276X
hello saturns tech's i am posting this because my customer went to the dealer on a saturday when we were closed and they told him because of a code 46 and 86 they would have to replace the whole abs module pump and electrical part// so he came here today and i...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Riviera 3.8L aLTERNATOR VIN: 1G4GD2216S
Many people replied, and the breakdown was that the culprit was probably a bad thermister on the battery cable. It probably was, but several said that the whole computer could be bypassed by cutting the wires to the computer and putting a 194 bulb in series b...
2003 Buick Rendezvous CX 3.4L loss of heat VIN: 3G5DB03E93
We'll here I go. After letting it idle for 1 hr the exhaust gas tester finally showed fail. So with that in mind we are going after head gaskets and inspection of heads. I wish this would have showed this much faster just to put my mind at ease as far as a lar...
2005 Cadillac STS 4.6L all gauges VIN: 1G6D0C67A0
Thanks to all for the help Bill went out of his way to put this one to rest starter motor shorted pulling down system voltage just a coincidence problem after accident still updated pcm & ipm found chaffed wiring right rear door prevent problems in the future
1994 Chevrolet C1500 5.7L Misfire VIN: 1GM235GM56
One of my co workers has been using my iatn!!! I suggested to him that perhaps he should become a member of this fantasic organization, I think he did fix this pickup, its not one that is in the shop or anything I am working on. Call me selfish, but I didn't...
1995 Chevrolet Blazer 4.3L No Start
thanks for the help guys unfortunately it does not run yet the vehicle DOES NOT have security on it I DO NOT have with a problem with fuel pressure 65 psi. I put a new PCM in it and it had pulse for avbout 5-10 seconds I did the scratch test with the crank sen...
1996 Chevrolet C1500 Cheyenne 4.3L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: 1GCEC14WXT
well spending a few hours on this on. Ive got it figured out. this truck was brought to me after 3 other shops replaced the egr, tps and others. On my solas scan tool I check what the MAF sould read and it had a wide range which it fell into, I cleaned it with...
1997 Chevrolet Lumina 3.1L MIL Lamp on VIN: 2G1WL52M9V
1997 Chevrolet Cavalier 2.2L Hesitation VIN: HJWEUY8709
as 95% of you said it was the ignition module started right up and runs perfect thanks to all replies and happy new year
2003 Chevrolet Silverado 2500 HD 6.6L No Start VIN: 1GCHK29163
we replaced the fuel pressure regulator and it seemed to be doing better, however sometimes we would have a long start or crank time before it would start, but because of the time required for the truck to act up we have returned it to the customer with the in...
2005 Chevrolet Colorado Z85 LS 3.5L No Start, Stall VIN: 1GCDT13665
Well this one is fixed, I had 4 replies, one said to check for voltage drops at the ign. switch and the other three said that it was the PCM. Since my scanner showed a yes for crank request and a no comand for the starter relay while the ign. switch was in the... Trouble codes: P0601.
1996 GMC G3500 Vandura 5.7L Hesitation VIN: 1GDEG25K9S
Rechecked fuel pressure on this TBI system.10 Psi,deadhead pressure 10 PSI.Replaced fuel pump.14 PSI,deadhead 25 PSI.Vehicle fixed.Thanks to all who responded.
2003 GMC Savana 3500 6.0L Poor Idle Quality, MIL Lamp on VIN: 1GTHG39U43
recieved 5 replies to this post, and some local help, and finally was able to fix vehicle. replies ranged from a faulty brake booster, warped intake, to a faulty MAF. just to summurize, the intake was not warped, MAF and MAP were ok, and the vehicle has hydr... Trouble codes: P0507 (high idle speed).
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next