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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 27, 2007
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1993 Buick LeSabre Limited 3.8L Hesitation, Cuts out, Stall VIN: 1G4HR53L8P
We are the third shop to try this one. Car will stall intermittently. Checked the Data from the computer and everything was going haywire. Put a computer in it and nothing changed but when I put a new prom in it the computer settled down and things looked norm...
1997 Cadillac Seville SLS 4.6L High Idle VIN: 1G6K552Y6V
Vehicle came in for high idle. C/S vehicle revs to 3,000 rpm after driving approx 10 miles. Idle will not lower unless you turn vehicle off. - We found and clened dirty throttle plates, vehicle also had o2 code, replaced sensor and fixed code for same. Vehicle...
1998 Cadillac Eldorado ESC 4.6L MIL Lamp on, theft warning VIN: 1G6EL12Y4W
Customer came in to have alternator checked due to warning light vehicle was not charging at idle and only 13v at higher rpm suspected a bad diode in alternator. Customer insisted on having his wife use the vehicle that evening against warnings. Guess what veh...
2002 Cadillac DeVille DTS 4.6L MIL Lamp on VIN: 1G6KF57982
Thanks in advance for your help. Car came in originally with both o2s switch identically. Car has no drivablity issues. Fuel control is plus or minus 2%. We sold the cat and now cat lights off and second o2 flat lines but code still returns within a week. Is t... Trouble codes: P0420
1996 Chevrolet K1500 Suburban 5.7L no power to cab VIN: 3GKFK16R2T
Hey guys I have a very intermittant problem here. The customer turns key and nothing happens, puts the gear shift into nuetral, it will start. I was thinking nuetral safety switch or the ignition switch wires break in the column on these cars. check these item...
1996 Chevrolet K2500 Cheyenne 6.5L Unknown VIN: 1GCGK29F0T
engine stalls while driving or stumbles then restarts then could be fine for weeks then starts sumbling again .sets no codes
1997 Chevrolet K1500 5.7L Misfire VIN: 2GTEK19R8V
This Z71 has an engine miss while driving at highway speed. Idles great, terrific power from 0 to 100 mph, does not miss under hard acceleration. No codes will set, but my scanner shows mostly cyl. 5and 6 missing while driving.The alt. will drop out at high rp...
1998 Chevrolet Venture 3.4L Engine VIN: 1GNDX03E6W
Need advice on pulling the engine. I have the factory service manual but it is not clear how to pull the engine once everything is disconnected. It also uses a lot of special engine fixture tools that I do not have. Can the engine be pulled without pulling th...
2001 Chevrolet Monte Carlo SS 3.8L no crank often VIN: 2G1WX15K21
Thanks for the help in advance this car will not crank often.ignition switch will send battery voltage to start fuse when it will not crank .passlock voltage reads 1.7 with or without the car cranking even on a DVOM hookup to yellow read wire at lock cyl. supp...
2002 Chevrolet Impala 3.4L MIL Lamp on VIN: 2G1WF55E72
Car came in with P0420 code (Catalyst System Low Efficiency) running fine. Checked the rear O2 sensor and found too much activity. Replaced the after market cat with OEM cat and rear O2 sensor. Drove the car two miles and P0420 code came back. Rechecking, I f... Trouble codes: P0420 (Catalyst System Low Efficiency)
2002 Chevrolet Trailblazer LS 4.2L Poor Fuel Economy VIN: 1GNDT13S72
this vehicle has no power at all. when you accelerate it falls on its face and has no power. it acts like the cat convertor is plugged solid. we removed exhaust from manifold and it made no difference. we checked fuel pressure and its has 54 psi. rechecked fue...
2004 Chevrolet Tahoe LS 5.3L Air Conditioning
Hello fellow techs. I am having a dumb attack. This one came in with the cutomer complaint of no cold air on driver side. All other vents working. Checked and found a TSB to check wiring in the dash for kinks. Found no bad wires. Changed the actuator as indica...
1993 GMC C3500 Sierra SLE 7.4L MIL Lamp on VIN: 2GTHC39N3P
This veh has a check eng light on. Genysis idicates code 43 knock sensor failure. I have checked resistance in all the associated wiring. The scan tool indicates no for knock present while running and yes when I tap on block so It seems to be working yet the l... Trouble codes: 43 (Knock sensor Failure)
2003 Hummer H2 6.0L Rear Air Suspension VIN: 5GRGN23U83
Looking to find a possible reset procedure for "Service Air Suspension" message on DIC (Divers Information Center). Lucky me with no Tech 2, but Modis, everything in the modis for BCM except air suspension (as usual). Customer refuses to return to dealer after...
2003 Hummer H2 6.0L Hesitation VIN: 5GRGN23U63
Customer complained of hard start hot. After driving for 15 min or more and stopping for a short time, the truck cranks over for at least 1 minute before firing. Pressing throttle makes no difference. Truck displays 65psi pressure while cranking and holds pres... Trouble codes: P0300
1999 Oldsmobile Alero GLS 3.4L cooling syst. VIN: 1G3NF52E3X
Thankyou for your help. I have replaced the Intake for leaking.The thermostat was replaced when the intake was off. The customer had the water pump replaced before I got it. Now when you drive in the morning for about 7 miles it starts to overheat so I shut it...
2000 Oldsmobile Bravada 4.3L Hesitation, INT HARD START VIN: 1GHDT13W6Y
at the first start of the day, this vehicle sometimes starts hard but most of the time starts but will not accelerate until it has run for a few minutes, then it is fine. when acting up, it backfires through the intake. i have injected propane into the throttl...
1998 Pontiac Grand Am SE 2.4L rear brakes VIN: 1G2NE12T7W
this car has a popping type noise coming from rear (more from rt than lft) when brakes are applied i looked at rear brakes to ensure brakes were installed properly they were any help will be appreciated
2005 Saturn Ion-2 2.2L power steering VIN: 1G8AJ52F55
what next? while driving[after about 5 min.5 miles]the electronic p\s quits.[power steer message on dash]and code c0475. if you pull over shut the ignition off restart p\s works for a little less time and miles before quitting again.when p\s is working scan to...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Buick Park Avenue 3.8L Cuts out, Stall VIN: 1G4CW52K88
Thanks to all that responded- Most of your replies said that the crank sensor was a common failure. We replaced it but still continued w/same problem. We never got a code for anything but I put a reman Mass Airflow sensor in and the vehicle has been driving ...
1995 Cadillac Seville STS 4.6L brake lights VIN: 1G6KY5296S
10 replies, Two or three pointing toward security system, which is what I thought. One reply for hazard switch, One reply for brake light relay problems. Steve from Idaho was right with a defective brake light switch. At the brake light switch there is a resis...
1993 Chevrolet Lumina APV 3.8L Cuts out, Stall VIN: 1GNDU06L0P
the owner didnot wont to spend more many since the van is very old.but thanks you guys for your help on the smoking problem. It was the converter witch was blacked
1995 Chevrolet C3500 Cheyenne 6.5L No Start VIN: 1GCHC39F1S
Took me some time to find an after-market source for the external installation. Vehicle started running satisfactory and the customer is happy. Thanks to you all ATN members reply!
2000 Chevrolet Express 1500 4.3L No Start VIN: 1GCEG15W4Y
Well this one is finally fixed! While all of the suggestions were good, we had already tried most of them. We decided to start over in diagnosing this vehicle. It has been my experiance that if you can't solve a problem, you are usually overlooking something s...
2001 Chevrolet Camaro 3.8L MIL Lamp on VIN: 2G1FP22K61
So I told the customer to get a good cat from the chevy dealer and he did, and he let me put it on. I drove the car 75 miles no code. thanks to all who replied, and also i kept his flow master ill find some use for it. thanks again Shawn [...] Trouble codes: P0420 (cat eff. low).
2003 GMC Sierra 1500 HD SLE 6.0L Cuts out, MIL Lamp on VIN: 1GTGK13U63
Well gang, thanks for the info. I broke down and went to gm today and $500 later the truck has a new throttle body asm. An hour later the mil came back on with the same problem. To date, clean all grounds, check all wiring specified in gm tsb, replace tac asm.... Trouble codes: P1518.
1999 Oldsmobile Aurora 4.0L interior VIN: 1G3GR62C5X
Sorry guys, but nothing to really tell. After removing cover from under dash, so that I could feel what was buzzing, noise hasn't returned. It's been 300 miles. Customer now says she's picking it up & trading it in tomorrow. If something happens before then I'...
2000 Oldsmobile Bravada 4.3L transfer case VIN: 1GHDT13W1Y
Sorry for the delay on this one. There was suggestions of tire diameter & transfer case shift motor. Tires matched well & there was not a positive traction differential. We found out by engaging the lockup on this AWD single range transfer case w/Modis, that ...
2003 Pontiac Vibe 1.8L wheel brg. VIN: 5Y2SM64883
After looking the veichle over one more time ,I decided to send the Vibe to a dealer that has a brg. press. Thank you to all that replied to help me, because it helped me to not get in over my head. You guys a sure a lot of help.
1995 Saturn SL1 1.9L MIL Lamp on VIN: 1G8ZH5283F
Hi everyone, I got a hold of a Tech 1 scan tool and I was able to retreive DTC's Found DTC,s related to coolant temp sensor circuit, data list confirmed improper coolant temp. I inspected the sensor and found the end of the sensor in the coolant passage was... Trouble codes: 12.
2002 Saturn Vue 2.2L ac control VIN: 5GZCZ23D42
I have not had this vehicle back but will see it again at a later date, techs have sent me info which I intend to try, two techs had a problem with the resistor card, one replaced the head which only fixed half the problem had to replace the card also to fix a...
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