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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 23, 2008
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Open Help Requests for GM
Help Request Answers
1996 Buick Century Custom 3.1L Surge, Stall VIN: 1G4GA55M5T
hi everyone. this buick is something else. when i put the car in gear and start to brake torque it it stumbles and stalls i have checked every sensor check all the powers at the computer they seem alright. i have checked the grounds, voltage droped them less t...
2004 Buick Rendezvous CX 3.4L Stall VIN: 3G5DA03E84
dies at random. intermitt no start. odm reads error, shift indicator moves while in park, tack jumps before it dies. Trouble codes: B3103, B2712, B2961
1994 Cadillac Seville STS 4.6L Blower Motor VIN: 1G6KY5290R
Very low milage & clean car. A/C blows on high with key off & will run battery down. Did test in no data & back probed gry/bl wire , no voltage, All Data said replace ACP. Searched data base & found a lot of problems with blower motor. Would like some advise f...
2006 Cadillac SRX 3.6L air bag light VIN: 1GYEE63766
Need some advice here. SRX came from the body shop next door Hard hit air bags deployed, side curtain bags etc, & codes in the computer. All related to the hit We or the body shop have changed all related components new Derm new bags, new seat tensioners etc. ...
1990 Chevrolet C1500 454 SS 7.4L ingagement VIN: 1GCDC14N1L
This is a new customer for us,towed in with noise(flywheel cracked.But notice as you drive forward or reverse comes out of gear and then catches.Drove on highway seems to shift fine under accel.Jasper reman install dec 29 2004,fluid was clean no odd metal in p...
1994 Chevrolet K1500 Cheyenne 5.7L power steering VIN: 1GCEK14K9R
When driving strait down the road at any speed the steering will jerk like a child is tugging on it for 1/2 of a second. It only does it after about 5-10 miles of driving. And feels similar to the 97 trucks that have the steering sensors that go bad but this i...
1995 Chevrolet C1500 Suburban 5.7L Excessive Emissions
Vehicle failed emissions testing due to high HC, CO and NOx passed. Check engine light on intermittantly, code 44 (lean) in memory. If throttle is opened slowly everything is ok, if throtle is opened quickly ( not a lot of throttle just a quick 10% opening ) E... Trouble codes: 44 (Lean condition)
1995 Chevrolet Cavalier 2.2L heating VIN: 1G1LC52465
Thanks in advance, The issue im having is very minimal output from the heating system in all vent positions. I recently installed a new heater core due to the previous unit leaking. During install i noted the mixture flap was opening and closing and was not bi...
1996 Chevrolet Cavalier 2.4L water pump VIN: 6T91MPAAAT
I have a car here i have never sean before and would love some help. Any information, repair instructions, aprox labour times etc, to replace water pump. It looks as if its timing chain driven and in a terrible position, any help appreciated...mick, australia....
1998 Chevrolet Metro LSi 1.3L No Start VIN: 2C1MR522XW
Car came into the shop with a no start condition. Found that it was not getting signal to trigger injectors on cyl 2 & 3, scoped the crank sensor and saw a good signal, checked the harness for any wiring issues, everything pointed at the ecm, so replaced it wi...
2000 Chevrolet Venture 3.4L brake lite system VIN: 1GNDX0302Y
I have an electrical demon in this truck. when you apply the brakes all the rear bulbs on both sides lite up (turn,tail,and back-up) I loose approx 3 volts to the fuel pump,the service engine lite comes on, the abs lite illluminates,(when checked no codes pres...
2000 Chevrolet Silverado 1500 5.3L alternator VIN: 2GCEK19T6Y
Have a pickup that seems to eat alternators, First replaced at 175K next at219K [16 months] [...] [9 months]now 249K[ 3months]Only has an occasional battery light and code P1637 [gen. l. terminal fault] I suspect PCM but was hoping for some input. Alek
2000 Chevrolet Astro 4.3L No Start VIN: 1GNDM19W0Y
We have an "interesting" problem with a 2000 Chevy Astro with the Vortec 4.3l engine. The truck came in on the hook for stall while driving/no restart. The owner told us that just before it quit, it was backfiring through the intake and out the exhaust. We ch... Trouble codes: P0300 (Random misfire)
2001 Chevrolet Blazer LS 4.3L transfer case VIN: 1GNDT13W71
Hey everyone, this is my first post here, so go easy one me. This one came to me last summer with the complaint of the four wheel drive not working. Using the switch on the dash found no response AND NO service 4X4 light on. At the time, my scanner wasn't up...
2002 Chevrolet Trailblazer LS 4.2L left low beam headlight VIN: 1GNDT13S42
vehicle was in a month ago w/low beam on left side inop. found connector and bulb melted(circuit 712). replaced bulb & harness, harness was ACDelco-bulb was a Wagner 9006U HB4. checked for voltage drop:ok. released vehicle to customer. vehicle is back with sam...
2002 Chevrolet Impala 3.8L Starting VIN: 2G1WF55K02
Intermittent no crank. An on going problem over the past 3 months. The patrol states that the car will not crank at times has noticed more issue after vehicle has been opperated 4 hours or more. I have replaced the key lock and cylinder on symptom alone (did n...
2002 Chevrolet Trailblazer LS 4.2L T-case VIN: 1GNDT13S02
Vehicle came in with no four wheel drive operation. Connected scan tool and had no communication. Removed fuse for a 1/2 hour and still had no communication. Replaced transfer case control module and had GM flash it. Four wheel drive shift into all ranges but ...
2004 Chevrolet Suburban 1500 LT 5.3L No Start VIN: 3GNFK16T94
have a wierd one here hoping for some insight or help got this suburban that we at the shop have not had the chance to see the actual problem occur but the customer states that after every fill up of fuel the vehcile has to be cranked 3- 5 times to get the veh...
2004 Chevrolet Colorado Z71 3.5L Poor Idle Quality VIN: 1GCDS14694
Hello all, thanks in advance for any ideas. This Colorado came in late today, have not had alot of time to spend on it, thought I could get some ideas for tomorrow morning. Rough/low idle, almost a vibration, had listed codes in memory, MAP sensor seems to tes... Trouble codes: P0506 (Idle control system RPM too low), P0106 (MAP or BARO ckt. out of range)
2006 Chevrolet Impala LS 3.5L engine VIN: 2G1WB55K86
Customer came in low on coolant. Cap did not hold pressure so we replaced it. Two weeks later car came back overheating. low on coolant tested cap not holding pressure. so we replaced the cap again. car came back after 1 month still overheating 1500 miles. no ...
1995 Oldsmobile Achieva S 3.1L No Start VIN: 1G3NL55M6S
Please help this one is driving me crazy, Customer complains that car is very hard to start when the engine is cold. After it cools down a couple of hrs. it will start after a long period of cranking, the colder it is out the longer it takes to start, at 40 de...
1998 Pontiac Sunfire GT 2.4L Cruise VIN: 1G2JD12T6W
Here we go, The cruise will not work in fifth gear! It works fine in forth,third,and second as long as your over 25mph, but put it in O/D it quits. What's happening is the cruise inhibit signal from the pcm is losing ground then shutting the cruise off. If yo...
2000 Pontiac Sunfire SE 2.2L warning lamp VIN: 1G2JB5245Y
Hello all, Trying to find the answer to what should be a simple question. Will the failure of the EBTCM cause the red Brake Warning light on the dash to illuminate? The vehicle owner is trying to get their state inspection done, but the red brake light on t...
2001 Saturn L100 2.2L Excessive Emissions, Hesitation, Stall VIN: 1G8JR52F61
car came would not start low battery chargrd battery cleaned fould spark plugs , theonly way we could get car started was to hold throttle to floor and when engine sounded like it was going to start let throttle fly back to idle engine starts idles slow then r...

Fixes & Summaries for GM
Fix/Summary Answers
1987 Chevrolet R10 Custom Deluxe 5.7L No Start VIN: 1GCDR14K1H
thanks to all that replied . the switch was the problem . we kept getting the one for carb. and we had fuel injected system.
1995 Chevrolet K1500 Cheyenne 4.3L Cuts out, Stall VIN: 1GCEK14Z3S
I want to thank those who replied it ended up being the new rotor in the distributer the customer did not get it seated all the way down and it broke the slot off allowing it to turn. thanks again for the help
1997 Chevrolet Blazer 4.3L Transfer Case / Front Diff VIN: 1GNDT13W6V
Eric, Bradford, and Kris--Thanks a bunch for your replies and insight. The problem ended up being internal to the transfer case. The shift/encoder motor was working properly. After looking at further, and driving this vehicle on the lift, the front drivesha...
2000 Chevrolet Cavalier LS 2.2L abs VIN: 1G1JF5241Y
Sorry it took a few weeks to get back,but after scoping both wheel speed sensors and replacing the left front we decided to install both the front harnesses.It has been a few weeks and have not seen the car.I think it is fixed.thank you for the help. Jon
2001 Chevrolet Express 3500 5.7L No Start, Hesitation, Cuts out, Misfire VIN: 1GBJG31R21
2001 Chevrolet Astro 4.3L fuel spews out from VIN: 1GCDM19W41
Once again iATN is great. As many of you had suggested, i checked the fuel tank vent valve. I found it to be sticking. I obtained one from GM dealer. Cleared codes, Cleaned Mass Air Flow Sensor, Customer has refilled tank twice already, only problem is that he...
2003 Chevrolet Impala 3.4L rack, column VIN: 2G1WF52E83
It turns out that there is a TSB on this problem that was missed initially and pointed out by several members. It is bulletin #04-02-32-001c to correct pinion seal leak or squeak,bearing kit P/N [...]. Rack replacement is not necessary. I must point out tha...
2005 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: 1GNDT13SX5
Thanks to all that responded. Mark from Texas hit it right on the head. The very low miss counts and the fact I couldn't feel a problem was throwing me off of sticking to the basics. The computer was seeing a miss, how ever few it was and I thought since I ...
1990 Oldsmobile Cutlass Ciera SL 3.3L Torque steer, instability VIN: 1G3AM54N6L
Hello everyone, Thanks to everyone who took time to reply back to me. I ended up replacing both the front drive axles. Customer told us the vehicle drives fine now. I did not see anything different with the ones I replaced and I really did not think the vehicl...
2004 Oldsmobile Alero GL 3.4L suspension VIN: 1G3NL52E14
first off thank you guys for all of the help, you all steered me in the right direction. the problem ended up being in the passenger side wheel bearing. There wasnt any noticable play or roughness in the bearing, so we replaced the bearing with an oem hub and ...
2003 Saturn Vue 3.0L electronic steering VIN: 5GZCZ63B33
we sent the customer to a saturn dealer.we suspected the problem was in bcm but could not program it if we replaced it.hopefully the customer will inform me about fix
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