× 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 April 3, 2007
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
2002 Buick Rendezvous CX 3.4L RPM jumps up going down the road VIN: 3G5DA03E02
I think it might need a TFP Switch, has anybody see anything else,with this Code and problem.
1990 Chevrolet C1500 Cheyenne 4.3L Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 1GCDC14Z51
thank you for looking. we have this truck that came in with a hard start/miss/hesitate. truck will bake fire on acc. every time truck misses the check engine light fashes on then goes out. installed scan tool no codes. checked all conections at battery & engin...
1992 Chevrolet C2500 Cheyenne 6.5L overdrive VIN: 1GCGC24F1N
We have a truck that intermittantly will not shift into overdrive. When it does not shift into overdrive, we notice that lower gears shift noticeably harder (firmer?). If you are cruising down the road and it did not shift into overdrive, you can put it in neu...
1994 Chevrolet Corsica 3.1L No Start, Cuts out, MIL Lamp on VIN: 1G1LD55M5R
hi everybody iīm new in this site I have in my shop this corsica when the costumer brings this car running real bad alternator very hot, diodes, brushes,blowns we try whith another alternator, but engine no start I try with another PCM and stills no runs Itry ...
1998 Chevrolet C1500 Cheyenne 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: R1W1174063
vehicle came in because it runs rough. has misfire code stored. cap, rotor, fuel filter have been replaced by us due to wear and age. someone has has replaced fuel pump twice, CPI unit, plugs and wires. misfire comes and goes as it pleases and it is always on ... Trouble codes: P0300
1998 Chevrolet Blazer 4.3L temp door actuator VIN: 1GNDT13W3W
replaced actuator because gear teeth were broken. new actuator still defaults to the hot side of the door. tried to reset by disconnecting radio fuse and battery. did not change anything. at 74 degrees can tell the vacuum part starts to work. thank you for you...
1999 Chevrolet K1500 Suburban 5.7L p0302 VIN: 3GNFK16RXX
good customer was on trip ck eng light came on, engine died had some shop replace plugs and crank sensor. came back in town found code 0302 running ok, replaced old wires cap and rotor fuel filter, reset light came back on on highway within 2-3 weeks, running ... Trouble codes: P0302 (2 cyl missfire)
2000 Chevrolet Astro 4.3L AWD system VIN: 1GNEL19WXY
This is an all wheel drive Astro van. During slow speed cornering, the vehicle crabs bad. It feels like a full size truck in 4wd low. Anyone have any ideas? Thanks, Jon
2002 Chevrolet Venture LS 3.4L windshield wipers VIN: 1GNDX03E52
I have a 2002 chevy venture van. When I reseved it the wipers would not park, all other modes work fine. I found park stop on the transmission was worn down and the parking tab would not make contact so replaced the transmission and crank arm. Fixed right not!...
2003 Chevrolet Suburban 1500 LS 5.3L instrument cluster VIN: 3GNFK16ZX3
Greetings techs. I have an electrical problem with the instrument cluster in this Sub. None of the gauges work. Upon checking power and ground to the cluster I have found that I have a problem on power circuit B11(orange wire on back of cluster). It started ou...
2003 Chevrolet Express 1500 4.3L charging lite VIN: 1GCFG15X83
van towed in charging not working. tested systen found defective alt. instaled anew alt retest ok 80 amp 14.5 volts. fixed?. went to del van and then battery lite 1 blink. volt gauge still showing 14.3 got lite to come on a few more times. back to shop. scan p...
2003 Chevrolet Express 2500 4.8L Misfire, MIL Lamp on VIN: 1GCGG25V23
Here's one for the books. This van has a misfire on #3 and #1 cylinders at idle until around 2000rpm. #3 misfires a lot more than #1 cylinder. The misfire counter goes to 0 between 1800 to 2000 rpm. We swapped the plugs, coil packs with the cylinders that don'... Trouble codes: P0300
2001 Geo METRO 1.3L Mechanical VIN: 2C1MR52221
This one got me pulling my hair out. A body shop bought this thing with a bad motor they installed A used motor an it run about 40 miles & started running real bad so they swapped it with another used engine. din't run but a mile swap it out for another used e...
2002 GMC Sonoma SLS 4.3L Hesitation, Cuts out VIN: 1GTDT13W22
Engine 'suddenly' acquired the symptom of almost totally cutting out under 45% load. When pedal is moved past about 50% (even in neutral) engine dies from lack of fuel. (If Gumout is used to enrichen the intake air the engine instantly resumes speed). Runs per...
2004 GMC Jimmy SLS 4.3L won't take fuel VIN: 1GKCT18X74
once again thanks 4 everyone's input on our last situation. this time have a vehicle that won't take fuel. evap system seems to be working fine, there are no codes present. found the rubber hose in between the filler neck and tank slightly colapsed removed and...
1995 Oldsmobile Silhouette 3.8L Poor Idle Quality VIN: 1GHDU06L9S
The TPS will act up intermittently. When this happens it will set a code(P0123), turn the MIL light on, the vehicle idles fast, the transmission doesn't shift right(shift points are off), and on the scanner data the ECM reads the TPS voltage as 4.5V even thoug... Trouble codes: P0123 (TP Sensor High)
1995 Pontiac Bonneville SE 3.8L Head Gaskets VIN: 1G2HX52K9S
Hello. Being a Ford tech (sorry), Iím not familiar with the common problems on GMs. 1995 Bonneville, 3.8L, K VIN#. Smoking antifreeze from the tailpipe. #1 and #4 cylinders poured antifreeze from Spark plug holes. Tore it down & replaced head gaskets (didnít l...
1997 Pontiac Bonneville SE 3.8L Accessories VIN: 1G2HX52K4V
Hey Again all and I hope this message finds you all well and full of all kinds of electrical knowledge!!! Greetings to the best in the world. This car has a pass key 2 system and, of course, it is failing. I measured the resistance at the key resistor and it i...
2000 Pontiac Bonneville SE 3.8L starter/spark VIN: 1G2H25413Y
vehicle came in for a bearing noise and a brake pulsation we also found that oil pressure sender was inop, reading 120psi of oil pressure, we replaced oil pressure sender and problem was fixed, also replaced hub bearing and rear pads and rotors. key was left o...
2000 Pontiac Bonneville SE 3.8L starter motor VIN: 1G2HX54K5Y
Intermittent crank and no start--When it cranks and starts, the engine may run well or may run terrible with exhaust odor, engine shake and stalling. When it runs terrible, the security light on the dash lights up and stays lit until we go to another start cyc...
1996 Saturn SL2 1.9L MIL Lamp on VIN: 1G8ZJ5277T
This vehicle came in with a complaint that the SES light comes on when the customer drives in the mountains and then goes off later. Had no SES when it was brought in but had a history code P105 map sensor circuit. Checks good on the flow chart. Our altitude i... Trouble codes: P0105

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick Century Custom 3.1L wipers VIN: 2G4WS52J6Y
You guys rock!!!Almost all the responses said to bend the tang on the motor bracket and that did the trick.I can't believe I have not run into this before.Thanks to all who responded,I appreciate your time!
1989 Cadillac DeVille 4.5L pcm VIN: 1G6CD5155K
Replaced the starter bracket that is in the TSB and this seeemed to fix the problem, Thanks for the advise everyone.
1996 Cadillac DeVille 4.6L Oil pump loses prime VIN: 1G6KD52YXT
The divorce is final. Oil pickup tube mating flange (where it bolts to the oil distribution plate) had been distorted during impact. Replacement of pickup tube and a NEW oil pan (used pan supplied on round #1 had a hairline crack, leaking oil) and this Northst...
1993 Chevrolet C3500 Cheyenne 6.5L hard start VIN: 1GTHC33F4P
after alot of checking for leaks and checking fuel supply and the relay i fpund the lift pump does run after you shut off the truck and the customer is happy about the truck starting hard but not as hard as it came in. no more either to start but i think it ne...
1994 Chevrolet Corsica 3.1L Stall VIN: 1G1LD55MXR
Thanks to all who rsponded, Most everyone thought the TCCS was the problem,So I disconnected it and test drove ,problem didnot occur but did set a code for EGR solenoid one, subtituted EGR valve and let customer drive for few days with no problem. then reconne...
1997 Chevrolet C1500 4.3L Fuel Gauge VIN: 1GTEC14W9V
Thank you for the 20 replies. Unfortunately the customer has not returned, but there were two general thoughts here. Confirm a good ground at the tank on the frame rail and dash/ instrument panel ground and the second was that these sending units are notorious...
1997 Chevrolet C1500 Suburban 5.7L Excessive Emissions, Poor Idle Quality, Cuts out, Misfire, Poor Fuel Economy VIN: 1GNFK16ROV
thanks for all the help, we pulled the assembly and cycled the key and found number 5&7 cylinders leaking after all others quit spraying, we replaced the whole spyder assy. and fixed the problem. thanks again
1998 Chevrolet S10 2.2L ign. loc cyl VIN: 1GCCS1448W
I didnt make it real clear in the help post about what going on here.Pass lock was the issue an did not know how much loc lube would affect magnetic field,so went real lite with the lube.The trouble was corroded wire plug at the sensor from leaving window down...
2001 Chevrolet Camaro 5.7L Mechanical VIN: 2R1FP22G01
The conclusion is that the LS1 motor has some noise on warm up because the motor has greater tolerences. But warmed up should quite out. The transmission didn;t have a problem. I think the sugestion that the car was overreved and bent a valve is more like it. ...
1995 Geo Tracker LSi 1.6L timing comp. VIN: 2CNBJ1862S
There is no accurate timing belt replacement procedure including Alldata and Mitchell. When and if you run into this simply set the camshaft timing 180 out. Strange but true!
2001 Pontiac Grand Prix GTP 3.8L c/v joint? VIN: 1G2WR521X1
wow 12 relies you guys are great!checked motor mounts and they looked good. mikael gave me the idea to run on hoist - drove on 4 post and supported a frames to keep axle at correct angle.found left side had a great deal of hop to it and right side was smooth. ...
2001 Saturn L200 2.2L stft/ltftrim;subtrac VIN: 1G8JU52F51
Hi,# re: Jerry from ny. said ck. camshaft wear or valve worn can cause popping,although that was no longer an issue after the catalyst was replaced. Dave from ontario has seen alot of bad purge valves when they are located close to master cylinder, Bobby from ... Trouble codes: P0300, P1599, P0105.
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next