Prev iATN Members TechHelp for July 31, 2008
Automotive Technical Exchange for the Automotive Repair Professional		 Next
(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
1992 Buick LeSabre 3.8L Cuts out
when you drive car it can cut out any time when warmed up codes 41 42 43 we changed moduel only code left is code 41 cam sensor and crank sonsor ckeck ok and the magnet on cam gear does not look so good can anyone help Trouble codes: 41 (42 -), 42 (43 -), 43.		 View
1993 Buick LeSabre 3.8L Poor Idle Quality, Cuts out, MIL Lamp on
thanks to all who read this. guys please help me. this one is driving me nuts.car came in with check engine light. code 18 cam crank error. my tech ordered a cam sensor.. did not help. he ordered a crank sensor ,hum not that either.did find a bent fin on balan... Trouble codes: 18 (cam crank error).		 View
2003 Cadillac CTS 3.2L Poor Idle Quality
We have a 03 CTS in the shop that has a rough idle with the A/C compressor on. Idle is smooth with the a/c off. RPMs are not dropping, right at 700rpm. I'm thinking the engine mounts may be collapsed, they visually look fine. No misfires detected on scanner. Y...		 View
1994 Chevrolet KODIAC 6.6L pressure plate
the new clutch matched the old parts. clutch seems to slip even though throwout brg not putting pressure on fingers. seems to not have enough pressure on disc. there are three studs with nuts spaced on pressure plate against fingers. can i adjust these nuts an...		 View
1997 Chevrolet Blazer 4.3L No Start, Stall
After reaches operationg temp in closed loop status vehicle would stall without a restart. Spark good, fuel pressure good, cranking rpms okay, throttle position sensor reading .56 volts. Sure it isn't in a clear flood. Would not fire injectors. Injectors fired...		 View
1997 Chevrolet Tahoe 5.7L Hesitation, MIL Lamp on
I need some ideas on this truck. The truck basically runs like crap and has for some time. It doesn't run so bad that its undrivable just bad enough that you can tell somethings wrong. The check engine light was on so I pulled code and got the p0171, p0174 (bo... Trouble codes: p0171 (Fuel system lean bk 1), p0174 (Fuel system lean bnk 2).		 View
1999 Chevrolet Tracker 2.0L heater core
i have this tracker here that is going through heater cores. i have been using gm replacment parts, i have inspected the heater box for objects that could cause damage to the core, no problems found and no damage to the core, they just start leaking. this is a...		 View
1999 Chevrolet Astro 4.3L Hesitation, Surge, Cuts out, Misfire
Wow, this one has been a headache. repair has been done as follow and above. found cat. converter bad replaced. dis. cap bad replaced . rotors. plugs, wires leak down test no leak in any cylinders. adjusted dis. by grinding bolt hole . problem went away for tw...		 View
2000 Chevrolet Impala 3.8L no interior lights
GM techs need your help again-maybe I sent in fix for this vehicle prematurely.The issu of the trunk light coming on out of nowhere and the security alarm goin off in the middle of the night appears to be FIXED.But now there are no interior lights & when turni...		 View
2001 Chevrolet Venture 3.4L No Start, Cuts out
Was driving this one home to a friend. Just cut out on me, pushed to side - waited about 15 minutes and it re-started. Went about 10 more miles - quit and had to be towed. The next day we replaced the security module near ignition key - reprogramed and car sta...		 View
2003 Chevrolet Silverado 6.0L Engine
Truck had the rear exhaust bolt on the right side broken. Someone had tried to extract it and had drilled the hole crooked and broken an easyout off in it. Due to limited access I pulled the head, extracted the easyout and old bolt. Installed a thread insert a...		 View
2004 Chevrolet Silverado 4.8L no 3rd
On test drive with scanner, no codes, can see shift solenoids commanded, and can see tcc commanded.At idle with tcc commanded engine stalls.Can manully shift gears and feels like I got 3rd.Have seen TSB for trash in 3rd solenoid bleed orfice and got pan off an...		 View
2007 Chevrolet Impala 3.9L Airbag
I received this Impala police car from a local body shop that had preformed the body repair and replaced the front crash sensors, air bag module under the seat and replaced the seat belt tensioners in the front. We got the car in and flashed the module and pre...		 View
1995 GMC Vandura 5.7L Hesitation
This vehicle came in overheating and leaking coolant severely at cylinder heads. We removed cylinder heads and they were cracked so we replaced them. After we got everything back together in running condition, we noticed on test-drive that it had a lack of pow...		 View
2003 GMC Sierra 6.6L oil pump
I have a 2003 gmc 2500hd that had come in the other day blowing a whiteshblue smoke heavily coming out of the tail pipe replaced mass airflow sensor due to check engine light being on and sensor testing bad thought that the sensor might have made the truck dum...		 View
1994 Oldsmobile Silhouette 3.8L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, MIL Lamp on
Good afternoon, I have a Olds that is making me pull my hair out! When it first came in our shop it had a dead misfire on cyl #4 and a customer complaint was that the idle would surge up and down. We found cyl #4 inj driver to be bad. So we replaced the ECM a... Trouble codes: p1361 (Ig control not toggling).		 View
2004 Pontiac Grand Prix 3.8L wont run monitor
hello everyone, IM HAVING A PROBLEM GETTING VEHICLE TO RUN CAT AND EVAP MONITORS,CAR WAS IN RECENTLY FOR PO135 (O2 SENSOR HEATER)SENSOR WAS REPLACED VEHICLE WAS RELEASED 1 WEEK AGO,WAS TO BE BROUGHT BACK FOR NEW YORK STATE INSP.AND FOUND CAT AND EVAP STILL NO...		 View

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick Park Avenue 3.8L Cuts out, Stall
Thanks to all who tried to help. The fix was a new pcm. I read all the replies and had already checked some of the things. I was not aware that a high resistance injector could shut down the whole sequensial injector driver, but mine were o/k 15 ohms across th...		 16
1999 Chevrolet Cavalier 2.2L Charging
I double checked ground at battery tray and problem fixed.Talked to a friend at GM and was told that the ground at the bottom of the battery tray is very common for corrosion.thanks for the help.		 2
2003 Chevrolet Tahoe 5.3L Hesitation, Stall
thanks to all who replied and especially Alex fron South Carolina, its been three weeks now and the customer called to say she believes the car is fixed, we disconnected the Ipod module, and all is well. 		10
2003 GMC Sierra 6.0L unknown
The fix was to replace the 8 round plastic leaf spring inserts! The TSB pertaining to this noise only mentions that they should be replaced if they are missing. Mine were not missing, but somewhat scrubbed-up and flattened out. I bought a Chassis Ear and pla...		 5
1992 Oldsmobile Cutlass Supreme 3.1L 1-2 shift
Several members suggested swapping the govener,we did,helped a little bit,also unhooking the tv cable at the throttle and jerking on it while the vehicle was running the valve was stuck! It freed up and we did a complete trans mission flush via the cooler line...		 10
1995 Pontiac Bonneville 3.8L lack of power
FIRST THANKS TO ALL THAT REPLIED. MOST OF YOU ASKED IF EXHAUST RESTRICTED, AND IF ANY ENGINE NOISE. NO THE EXHAUST IS NOT RESTRICED AND YES THERE IS A LITTLE LIFTER NOISE. FUEL PRESSURE IS GOOD. TRIED MASS AIR FLOW, NEW ECM AND PROM TO NO AVAIL. I RAN THROUGH ...		 21
2000 Saturn SL1 1.9L security
Thank You to everyone who replied. We ended up replacing the BCM & PCM with used (LKQ)pair out of a donar car. We Installed the used parts then went through the reprograming and whala it ran. We hesitated to go with used parts but this was getting very expensi...		 9
2002 Saturn SL2 1.9L key and tumbler
We thats about the most responses I have received in such a short period of time. Most were to get a factory key cut and try first. I did get a new factory key cut and late yesterday tried it. I was able to get the tumbler to turn, it is still stiff but at lea...		 8
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next