× 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 February 3, 2005
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
1996 Buick Regal 3.1L Poor Idle Quality, Hesitation, Stall, Misfire, hard start VIN: 2G4WB2M1T1
I did lower intake manifold gasket on this vehicle a week ago and everything ran fine, the customer came back in yesturday complaining that the vehicle was hard to start would run rough, would drag down on cold acceleration. I hooked up the Tech2 and no codes....
1998 Buick Regal 25th Anniversary Edition 3.8L Left front turn signal VIN: 2G4WF5212W
Hi Techs. This Regal has an intermittent problem with the left front signal. When problem occurs the rear bulb flashes very fast (like if a bulb was out). The front is dead. Looking at the diagram in Mitchell, the day-time running module is involved.The wire f...
1993 Chevrolet Corvette 40th Anniversary Edition 5.7L Interior lights and keyless entry system VIN: 1G1YY23P5P
Hi Folks, I am thinking of booking myself into the funny farm on this one. Car came in for battery going flat overnight. Isolated problem to interior lights staying on all the time. Cured problem by repairing grounded white wire. Now the problem starts with in...
1994 Chevrolet S10 Blazer Tahoe 4.3L No Start VIN: 1GNDT13W6R
Hey everyone..We've got this s blazer that will not start after sitting all night in 20 degrees or colder temps. cranks fine. check computer history no codes present. Thought coolant temp sensor was not working but scan tool indicated identical to outside temp...
1996 Chevrolet Astro 4.3L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: 1GBDM19W2T
vehicle trys to correct for rich condition until cel comes on for codes.has new gm pump and sender and fuel pressure is still high.removed return line and ran into gas can and installed new pressure line from sender to connection at back of cylinder head-no ch... Trouble codes: 172 (rich condition bank 1), 175 (rich condition bank 2)
1997 Chevrolet Blazer 4.3L Lower Ball Jt VIN: 1GNCT18N6V
Greetings, GM guys; hope someone can help me out here... The situation is that this vehicle is just about to go out of an aftermarket warranty (less than 1000 miles left). The warranty company paid to have both of the lower ball joints replaced just over 1 ye...
1999 Chevrolet Astro 4.3L drl VIN: 1GNDM19W5X
DRL's do not come on & lights do not come on automatically at night. I have checked all fuses & relays, scanned body controls with Genesis & found no codes.Lights seem to work fine otherwise.
2000 Chevrolet Venture 3.4L steering
Dear Friends, Got a Chevy van that vibrates from about 25 mph on up to highway speeds but only under acceleration mild or heavy. It began, according to the customer when we replaced the struts, shocks and the left outter tie rod end. I have checked everything ...
2002 Chevrolet Gruman P30 6.5L Excessive Emissions, Poor Idle Quality, Hesitation, Surge VIN: 5B4KP42Y42
I'm not sure where to start with this. I have no DTC's. The truck runs terrible. It's blowing black smoke...Running heavily rich and the idle continuously surges. Any Idea for a starting point?
2002 Chevrolet Venture LS 3.4L fuse box VIN: 1GNDX03E92
we just want to know if antbody has had a similiar problem with a chevy venture,we have a problem with the under dash fuse box, any movement with the box and the van starts to run bad and or stall. we've replaced all the pigtails from the fuse box to about 18"...
2002 Chevrolet Trailblazer LS 4.2L outside temp VIN: 1GND513S12
hello gm techs.this trailblazer came in with some shift lock problems i was able to solve, but the ambient temp reads (Ice possible), I tried to locate the temp sensor on top of the radiator. That's were mitchell said it was, disconnected it but no change. I d...
1982 Oldsmobile Delta 88 Royale Brougham 5.7L routing VIN: 1G3AY69N9C
I need the 5.7 injection pump firing order including the direction of rotation and position of the number one line. There is no 12 or 6 oclock position. I also need to be sure that the information includes if the firing order is from a view facing the vehicle ...
1990 Oldsmobile Cutlass Ciera 3.3L Surge VIN: 1G3AJ54N0L
Eating my Lunch. Hello Gm Techns, I need help on this fine oldsmobile, This condition only comes on during close loop operation intergator at about 79-110, block learn 113, suring very badly only in close loop, Fuel presure is okay, no leaking fuel regulator, ...
1994 Oldsmobile Cutlass Supreme S 3.1L automatic door locks VIN: 1G3WH55M6R
Hi everyone, Customer just purchased a 94 olds that automaticaly locks the doors when the car is put in drive and she would like that feature disabled, I don't have a wireing diagram for this car and was hoping that someone would be able to tell me which wire ...
2001 Oldsmobile Silhouette Premiere 3.4L engine VIN: 1GHDX13E31
This van will use oil on long trips at highway speeds,but driving around town it will not.the lady went on a trip to ohio the van used a quart & half of oil.she filled it up drove around town for a week checked oil before leavingthe oil was still full,came bac...
1990 Pontiac Sunbird LE 2.0L Blower Fan VIN: 152JB54HXR
Dear Friends, I have been working on this problem for two days now and just cannot understand where to turn next. This vehicle came in when it was very very cold and the blower fan for the room heater was not working, I gave power to the motor and found out th...
1998 Pontiac Grand Prix GTP 3.8L Starts & Dies VIN: 1G2WP521XW
My problem is when ignition turned on Fuel pump comes on and fuel pressure is perfect. When started ecm shuts of 12 volts on ecm pin #39 Lt Grn circuit 497 to fuel pump speed control relay. Fuel pump shuts off and engine dies, and the minute engine dies relay ...
1997 Saturn SL 1.9L MIL Lamp on VIN: 1G8ZFS286V
This car came in with a p1404 egr pos. error. The valve had extensive carbon buildup. It was open 12% with .88 V on the pos. sensor wire. Cleaning it did not lower the voltage. After replacing the valve, it was open 7% with .76 V on the pos. sensor wire. Accor... Trouble codes: P1404 (egr pos. incorrect)
1998 Saturn SL1 1.9L Engine oil in coolant VIN: 1G8ZH5284W
This car came in at 80,000 miles with engine oil in the coolant. The head gasket was replaced. The car went approxmently 10,000 miles and it's back pushing oil into the coolant again. The strange thing about this is there doesn't seem to be coolant in the oil....

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick Regal LS 3.8L ABS amber lamp on and TC disable light VIN: 2G4WB52K1V
After getting my wits together the next morning and reading information from my replies I decided to do a harness check on every connector and pull them apart and check the terminal crimps and weather packs. After tighting up the terminals at the controller fo...
1999 Buick Regal LS 3.8L service engine soon and airbag lights on VIN: 2G4WB52K5X
Thanks to everyone who responded. The owner of this car took it to a smog place and they couldn't fix it. Then they took it to a place called Dwayne's Automotive where the code was cleared with a Tech 2 Scan Tool. The light is now out. Thanks, Rick [...].
1999 Cadillac DeVille 4.6L Anti Theft VIN: 1G6KD54Y7X
Thanks for all the replies Everyone sent me in the right direction.The wires that go to the tumbler were broken i had to replace the tumbler and had two new keys with chips made. Custumer didnt Want To By Pass I Offered That Option.
1969 Chevrolet nova 250CID Mechanical VIN: 1G3K4124FR
I would like to thank the gentleman that advised me to use s10 spindles on my 69 Nova as a disc brake con version.He told me to use a die grinder to slightly enlarge the lower ball joint hole to install the s1o ball joint. The top ball joint fit right in with ...
1994 Chevrolet K1500 5.7L Poor Idle Quality, Stall, Misfire VIN: 2GCEK19K1R
after testing and exploring many ideas and suggestions from iatn members we reluctantly rebuilt (with all new parts) the reman dist we installed and fixed the problem. thanks to all that helped.
1994 Chevrolet G30 Chevy Van 5.7L Electronic VIN: 1GBJH32KXR
Customer returned today and I checked gounds like most of you said, voltage drop on negitive circuit from battery to alternator was 1.50V to much. Alternator output was 13.10V to low. Ran jumper wire from alternator housing to battery negitive terminal, Altern...
1994 Chevrolet Lumina APV 3.1L ignition switch - neutral safety switch
Thanks to the members who replied. Almost all of you said to re-check all grounds or wiring from switch to starter. After finding nothing with the grounds again, I started at the ignition switch checking wiring right to the starter. I found the van had an anti...
1996 Chevrolet Cavalier LS 2.4L hyd lifter VIN: 4G1JF32T8T
Sorrty i did not close the post correctly. The fix was that the machine shop did not correctly perform the valve job.
1996 Chevrolet Blazer 4.3L 4whd VIN: 1GNDT13W9T
kudos to roy from indiana. the harness connector going into the encoder motor was completely corroded. i repaired terminal ends and everything's okay. thanx guys and especially roy.
1996 Chevrolet Corsica 3.1L No Start, Misfire VIN: 1G1LD55M4T
After charging battery today we made a attempt to start this car and it did start after holding pedal to the floor. car ran very bad and excessive noise(clattering) lifter/rocker noise. We kept car running and I removed the oil fill cap and noticed that one of... Trouble codes: P0300.
1997 Chevrolet Cavalier 2.2L warning lights, temp, gauge and running lights VIN: 1G1JC5245V
Had some real good suggestions to my problem, I failed to inform that I had already checked a/c voltage and charge rate of electrical and performed loaded ground drop test on circuits, I had not known about the ground at the battery tray, I cleaned and voltage...
2001 Chevrolet Silverado 1500 5.3L air box VIN: 2GCEK19T81
this was an easy one because of this network. mod didn't have this bulletin and everyone else did it seems. you can't trust anything these days. the fix was to repair the gasket fromheater box to firewall and fill it with rvt. a terrible design flaw up here in...
2003 GMC Savana 3500 6.0L Alignment VIN: 1GTHG35U13
We received 5 replies in answer to our issue 2 reported that they had hit idler and pitman arms that required replacement as well, only one had had to replace upper ball joints.The other three mentioned alignements were comon on these as well,after we replaced...
1996 Oldsmobile Aurora 4.0L No Start VIN: 1G3GR62C9T
I want to thank you guys that answered with help(Dale,Michael,Roger, Michel,Reynaldo,Richard and Harry). We called the car back to the shop, cleaned the key lock cylinder and key then checked the resistance between the 2 small wires underneath the column the r...
2001 Pontiac Grand Prix GT 3.8L wipers VIN: 1G2WP12K01
Well I want to thank Bill [...],you guys hit the mark.It is a matter of not knowing what your looking at,I did the crank arm adjustment with the switch in the park positon,adjusted the arms ETC! ETC! ETC! with no luck.I gave up adju...
2002 Pontiac Montana 3.4L abs light VIN: 1GMDV03E02
Hi all- Unfortunately this vehicle left shop without repair, I had 4 replies and shopkey faxed diagnostic information for code[c1234]. I performed tests based on code.Diagnostic chart led to replace EBCM. 2 replies were explanation of code [sensor open/short]....
2000 Saturn SL1 1.9L ign switch VIN: 1G8ZH5284Y
On behalf of my employee I thank you all for your professional advice and input. My employee finds now that he has been mislead by the Saturn dealer into thinking that he MUST have a special and very expensive ignition key. He also now understands that he very...
2002 Saturn Vue 3.0L Hesitation, Surge, Stall, MIL Lamp on VIN: 5GZCZ63B92
Thanks to all who responded,good info about the 40pin connector in left kick panel. This connector looked fine(no corrosion). Customer brought the car back two weeks after post date, MIL light on. Scanned pcm with mastertech in global mode as this vehicle is n... Trouble codes: P0700 (trans control module request mil illumination), P2176 (minimum throttle position not learned).
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next