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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 4, 2006
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Open Help Requests for GM
Help Request Answers
2000 Buick Park Avenue 3.8L Electronic VIN: 1G4CW52K7Y
This car has been to my shop for complaint of heater only luke warm. I have found that the airconditionig compressor runs any time the fan is running. This is a dual climate control system. The compressor runs continualy even if you put the heat on 90 degrees ...
2004 Cadillac Escalade 6.0L Parking Assist VIN: 1GYEK63N14
I have very limited about of info. I have never worked on this before. The truck had been to the body shop for some small bumper repairs. Now the parking assist system doesn't work. I don't really know were to go from here. I have checked powers to the rear od...
1993 Chevrolet K1500 Suburban 5.7L Excessive Emissions, High fuel pressure VIN: 1GNFK16K69
This truck came in as an emissions test failure with excessive hydrocarbons at decel. A road test determined that there was no obvious misfire and I backed this up with a secondary ignition scope check. Four-gas analysis found good readings at idle and 2500 RP...
1994 Chevrolet Beretta 3.1L No Start, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G1LV15M2R
engine was replaced by a customer outside of the shop when it was towed in it had a 3x signal error code replaced crank and cam sensors since it was a used motor replace ign module also have fire now fuel pressure to rail but no pulse on the injectors car wont...
1994 Chevrolet Beretta 2.2L Excessive Emissions, Hesitation, Surge VIN: 1G1LV1545R
Hello, First off, I'm an import guy and don't see many domestics. This car failed emissions on hc and has a surge at 45mph. I replaced the coolant temp sensor becouse of irratic readings and that took care of some of the runability. What I have left is a sur...
1998 Chevrolet S10 LS 4.3L transmission VIN: 1GCDT19X1W
Truck starts out in second gear then shifts into third and thats it, reverse is normal, replaced both shift solenoids and are clicking normally when commanded with scan tool fluid looks real good and truck has low miles any help would be greatly appreciated
1998 Chevrolet S10 2.2L Stall VIN: 1GCCS1444W
This vehicle will die intermittently at town speed and cruise. when it does it sets both codes P0335 crank sensor and P0341 cam sensor. we replaced the crank sensor, and checked the cam sensor on the scope, also checked the wires for both...any help would be a... Trouble codes: P0335, P0341
2000 Chevrolet Tracker 2.0L heater core VIN: 2CNBJ13C7Y
This is the third heater core in the last 18 months for this car. First one was replaced under warranty so I cant tell you what was found at that time. About six months later , same symptoms. Found the ends of the heater core tubes errodded away and a blackish...
2000 Chevrolet Malibu 3.1L engine VIN: 1G1ND52JXY
hello i need help from you guys again this malibu has been a real headache the oil presure has been up and down the oil preure light on and off the presure can start off as high as 35psi and drop as low as 10psi it had more of a knock in the bottom at times mo...
2001 Chevrolet Express 3500 5.7L No Start, MIL Lamp on VIN: 1GBHG31R11
Greetings to all and a happy new year.This mini box truck was towed in from another shop for a no start, it has fuel and spark but sounds like it is out of time.I scanned on board computer and found two codes p341,p1345.I scoped the sensors and both seem to ha... Trouble codes: P0341, P1345
2002 Chevrolet Cavalier LS Sport 2.2L MIL Lamp on VIN: 1G1JH12F12
I have spoken with GM TAC 4 times and we are both out of ideas. (case # 8671320) I do not want to throw a PCM at it. BUT P0105 keeps resetting within 1 minute of a steady cruising speed over 70 mph! All pin fits, wiring and both tps and map sensors test ok and... Trouble codes: P1005
2003 Chevrolet C4500 Kodiak C4C042 6.6L No Start VIN: 1GBC4E1123
hey all. this big truck wont start. i replaced the fuel filter (filled with fuel), it ran for a minute or 2, then died. will not start. i figured it sucked up air. so i went to the tank to pressure the fuel pump up, ( it has wires for a fuel pump,) and the pum...
2002 Chevrolet Impala LS 3.8L No Start, hard start VIN: 2G1WH55K92
Car runs great after starting, has a extended crank time with a intermittent sputter & then will start.The air filter was original & choked up, I changed the fuel filter(some restriction but not clogged)& changed the spark plugs also. the first start after tun...
1999 GMC K1500 Sierra SL 5.7L starter VIN: 2GTFK19T7X
when vehicle is parked for 3 days, will not start. battery has drained. body computer draws slightly too much but not enough to kill battery in 3 days. when radio fuse is removed drain is gone. radio has been unplugged - no difference. only other known power d...
2000 Oldsmobile Silhouette Premiere 3.4L abs VIN: 1NGDX13EOY
First working on this customer vehicle complaint is abs traction control light come on after it is moved about one foot scanned with a snap on mt2500 graphing scanner found codes for lf rf rr wheel speed variation verified complaint as lights came on the rough...
1991 Pontiac Grand Prix LE 2.3L No Start, Stall, Starts and dies VIN: 1G2WH54D2M
Hi fellow techs.. I got a difficult one here, 1991 Pontiac Grand Prix, towed in with a start and dies. No codes stored, will not continue to run on supplied fuel source through vacuum line. Everything checks good (Map, TPS, Igntion switch, ECT, CKP, even swapp...
1991 Pontiac Bonneville SE 3.8L No Start VIN: 1G2HZ51CM1
this vehicle came in as a no start w/ no spark. i have a coil pack/modgule assy as a quick test and swaped it out with same results. fuel pressure is low which may or may not be related as the customer stated vehicle had extended crank time prior to the no sta...
1998 Pontiac Grand Am SE 2.4L timing chain tensioner VIN: 1G2NE52T5W
Happy New Year I installed water pump, timing chain and gears, and tensioner. Package with tensioner stated to release tensioner.? Installed everything, disconnected connector at module and cranked it over until the oil pressure light went off. When I started ...
1999 Pontiac Grand Am SE 2.4L abs VIN: 1G2NE52T8X
ABS,SES,and Brake lights on. Has P0400 evap. problem and U1000 class 2 seriel comm. problem codes. ABS system will not respond. The P0400 dose not seem to apply to this vehicle,but it is there. I cant seem to get a good location on the Electronic Brake Control...
2002 Pontiac Firebird Formula 5.7L Poor Idle Quality, Misfire VIN: 2G2FV22GX2
This car has a miss at idle on every cylendar more on 1 and 6 but all of them miss only 2 to 5 counts per every cycle. but all cyl. are missfiring. It doesnt set a check engine light not missing enuff to set any code. all data looks normal on scan tool. The ca...
2001 Saturn L200 2.2L oil leak VIN: 1G8JU52F31
this came in with a major oil leak and was found to be a simple valve cover gasket.so gasket was replaced and engine was washed.vehicle returned 1 week later with oil leaking again.same area upon further diagnoses noiticed when removing oil dipstick or oil cap...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Cadillac DeVille 4.6L Air bag VIN: 1G6KD54Y1Y
Thanks everyone for your in-put. Sorry I took so long in replying. Was on vacation. It was the pretensioner (left front) cleared everything up.
1990 Chevrolet Lumina 3.1L No Start, Stall VIN: 2G1W54T1L1
I'm going to call it fixed I had tested all sensors but i had a couple of responses saying crank sensor so i threw a part at it new crank sensor and its all better now. the old one tested good but it must have been going out when it got hot and when i tested i...
2000 Chevrolet Impala LS 3.8L R/R brake caliper VIN: 2G1WH55K0Y
I cracked the brake lines starting at the master cylinder & working towards the rear of the car. No luck. Measured rotor thickness to make sure they were correct. Ok. Looked again at the calipers & pads. Noticed a raised tab on the inboard pad. It was not sitt...
2000 Chevrolet Monte Carlo SS 3.8L Cooling Systems VIN: 2G1WX12K4Y
First, I want to say thanks to all who replied. Unfortunatly we didn't get to the bottom of it because the customer decided to trade it in. Sorry for the delay. It wasn't sure if further repairs were going to be made or if the car was to be traded in. While we...
2002 Chevrolet Silverado 1500 4.3L No Start VIN: 1GCEC14W82
A few of you hit it right on the head. It seems that GM is having trouble with moisture getting into the distributor through the vent, causing corrosion and misfiring. Visually the cap & rotor didn't have any cracks, and no excessive deposits, but I put on a n...
2006 Chevrolet Trailblazer LT 4.2L No Start, Poor Idle Quality, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy VIN: 1GNDT13S76
Finally! The 2006 TrailBlazer flooding engine is cured! --Thank you for your time! of 26 guesses, a few suggested RF interference from the alternator or coils. we eliminated the alternator by cranking with it unplugged. many of you suggested sensors that are...
2003 Hummer H2 6.0L Misfire VIN: 5GRGN23U43
Thanks for the replies on this one. As several of you suggested the catalitic converter on the passenger side was bad. As soon as we actually ran it with the right upstream o2 out it smoothed out. We had to special order the cat from the Hummsters but it came ... Trouble codes: P0300 (Misfire code).
2001 Oldsmobile Alero GL 3.4L Hesitation, Surge VIN: 1G3NF1ZE41
called a few days later and he said that the problem was still there. called us back two weeks later and said that it is now gone...
2000 Saturn LS2 3.0L No Start VIN: 1G8JW52R7Y
thanks too all who replied , all replies were considered and checked , but we finally decided there was enough evidence to condem the ECM which is still warranteed by saturns 80,000 mile warranty , we supplied all information to dealer , they sold the customer...
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