× 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 December 10, 2009
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
1991 Buick Regal Custom 3.8L Mechanical VIN: 2G4WO5463M
I am checking to see if on this car if you can plug off the engine oil cooler lines. I have heard if on the s10 and blazer with oil cooler lines pluging off willsmoke the motor. The lines are discontinued but some dealers have them Trying save the customer som...
2002 Buick Park Avenue 3.8L Poor Idle Quality, Surge, Cuts out, Stall VIN: 1G4CW54K22
I worked on this car about 3 weeks ago ran fine tuneup cleaned tb and maf. customer came in yesterday said his car stalled sitting still in traffic. had car running looking under hood engine stumbled then recovered. scaned pcm had maf code in history I know wh... Trouble codes: P0102
1991 Cadillac Seville 4.9L Digi. Cluster VIN: 1G6KS53B3M
Customer drives 150 mi. roundtrip for work. Brought in with complaint of driving car for a little while, then digital cluster "zeros". Arrived in shop with cluster operating properly. After driving vehicle for approximately 65 miles, the speedometer read '0', ...
1987 Chevrolet V30 Custom Deluxe 7.4L Excessive Emissions, Poor Idle Quality, Surge, Stall
The vehicles came in and wouldn't idle. Found aftermarket distributor that was installed by customer in wrong positioned. Reset distributor and contacted supplier to verify distributor compatible with engine. Soaked base gasket to intake with carb cleaner and ...
1994 Chevrolet Blazer 5.7L No Start VIN: 1GNEK18K1R
I have a cranks no start problem that just happened all of a sudden the truck has been running fine i used it to move a trailer and parked it. I went back out to use it and it wont start. There is spark and you can hear the fuel pump come on. Hooked up the sca... Trouble codes: 33 (MAP sensor circut high), 35 (IAC error)
1996 Chevrolet Cavalier Z24 2.4L Hesitation VIN: 1G1JF52T3T
Hey all. Having cold accel issues with this quad 4. origionally came in with leaking water pump. Customer says ever since pump replaced when car cold for first one to two minutes it acts like running out of fuel. fuel pressure remains good during failure. repl...
2000 Chevrolet S10 4.3L transfer cas VIN: 1QRJKLKKKK
Electric shift 4x4. When switching from 2WD to 4WD the light flashes on the switch but will not engage into 4WD. When pushing the 2WD button again you hear a clunk and the transfer case dis engages. Anybody found the fix for this, NO CODES!! Thankyou.
2000 Chevrolet Suburban 1500 LT 5.3L Hesitation, Cuts out, Stall VIN: 3GNEC16TXY
HELP, three days after converter replacement cust returns complaining of severe hesitation on hard acceleration. full throttle take-off motor pops back, and stumbles and fall flat on its face. sometimes even stalls. 3/4 throttle take-off vehicle pulles hard an... Trouble codes: P1571 (tcs pwm circiut no signal. will not set mil.)
2001 Chevrolet Venture LT 3.4L Cooling Systems VIN: 1GNDX03EX1
After confirmed head gasket we replaced heads and put back together . My concern is the gauge goes to 3/4 and the low fan goes on at 226F. I can command the low fan and high fan from Genisys. When I command either one the temp plummets nicely. I bled the syste...
2003 Chevrolet Silverado 2500 HD 6.0L Reduce power mess. VIN: 1GCHK29U13
I have test all 35 steps in mithcel for tac operation and tp angles and on peddle also. Problem is int. as it has only happen on customer 2 times and I can not verify problem at this time . have seen diesels with peddel problems but not gas. Diag. has set me t... Trouble codes: P0120, P2139
2005 Chevrolet Silverado 1500 5.3L Hours Counter VIN: 2GCEK13TX5
Customer states that vehicle hours do not match mileage of vehicle, verified that hours are 274 & miles shown are 61,906 which cannot be, is there anyway hours could have been reset?
2006 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: 1GNDT13S86
Have a 2006 trailblazer with code p2135. Mil is not on all the time. Have wiggled wires and cleaned throttle body. Freeze frame shows code set at 0 RPM with app sensor 1 at 0.00 volts and app sensor 2 at .208 volts. Now mil is not on and tps are in agree mode.... Trouble codes: P2135
2007 Chevrolet Equinox LT 3.4L transfer case VIN: 2CNDL23F57
I've got this equinox that seems to be working fine with a intermitten traction light coming on. Scaned for codes, came up with a P1779 engine torque delivery to TCM signal and a po711 trans temp sensor. Couldn't find a flow chart on All Data for these codes. ...
1990 GMC C7000 Topkick C7H042 7.0L Hesitation VIN: 1GDP7H1MXL
dont work on many of these. has code 44 lean exhaust, suspect fuel pressure 16 psi . doesnt fit normal tbi systems. most are 9-13lbs and i see some are 26-32. have no info on these heavy trucks as we rarley work on them.question is ,what should the fuel pressu... Trouble codes: 44 (lean exhaust)
1999 GMC Jimmy SLT 4.3L temperture blend door VIN: 1GKDT13W3X
thank you in advance for any help or advice offered, this veh, came in with cust, complaint of 4wd not working and no a/c operation, we checked and repaired 4wd and proceeded to check operation of h,v,a,c,(with automatic temperture control) where we found that...
2000 GMC Safari SL 4.3L Misfire VIN: 1GTDM19WXY
This van is a high milage with a #3 cyl miss.New plugs,wires,cap,rotor,compresson at 125 psi and leak test good.It seems like fuel and before i tear top apart to get to injectors was wondering if anyone seen the wires chaff through on these someplace.I have wi...
2001 GMC Jimmy SLT 4.3L transfer case VIN: 1GTDT19W81
this has the insta-trac transfer case not the auto-trac. Very little information on diagnosing electrical with this-the unit is stuck in 4wd low. switch is blinking and can hear relays clicking even with key off. Disconnected switch-relays still clicking. disc...
2003 GMC Sierra 2500 6.0L Surge VIN: 1GTGK29U33
This vehicle when starting cold if you leave right away won't accelerate, no power, as soon as it warms it's great on accel and normal, other problem is driving at 90k, stepping into pedal, voltmeter drops and lights dim... never been able to reproduce for tes...
1999 Saturn SL1 1.9L Misfire VIN: 1G8ZF5281X
i started on this saturn due to large oil consumption and drivabilty issue, ( random miss ) i rebuilt the head found that all of the valve guide seals were just about gone, and after installing it getting new plugs and wires and even a new ignition coil for th...
2003 Saturn L200 2.2L Hesitation, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G8JU54F73
I'm having a shifting issue with this vehicle, its lacking power too but that can be due to the cat converter(waiting for part). The unit shifts at high RPM under load 3900 to 4100 rpm. When at express way speeds under acceleration it will down shift to 2nd ge... Trouble codes: P0300, P0420, P0172

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP54K0Y
As usual, these types of problems are very difficult to locate.Part of the problem is a deplorable lack of information from alldata, mitchell,etc. This one turned out to be a poor fuse contact in the front PDC. The fuse to the ing-pcm was not making good con...
1998 Cadillac DeVille 4.6L Interior Lights VIN: 1GEEH9OY9W
Hello and thanks for all the help, Well as you know this vehicle is converted into a hearse. There is a storage area under the rear floor that has room for the spare tire and odds and ends. This area has a small interior light to illuminate this area, I notice...
2001 Cadillac DeVille DTS 4.6L evap VIN: 1G6KE57Y41
broke wire at the connector to the purge valve FIXT WIRE NO PROPLEM THANK YOU Trouble codes: P0443 (evap canister purge valve).
1992 Chevrolet P30 7.4L No Start, Stall VIN: 1GBKP37N4N
Thanks Guy's for the help. Found a wire, curcuit 440 chaffing on the engine block that goes to the fuel pump relay. Sending this one down the road! again, thank you
1995 Chevrolet Lumina 3.1L No Start, Poor Idle Quality, Hesitation, Cuts out, Stall, MIL Lamp on
I finally got the car back [I thought the customer gave up on me , he thought he needed a tune up].Let me reiterate my process of diagnosis [you will probably wonder how this guy is working on cars].KOEO map reads .02 on scanner.Disconnect map and check for 5v... Trouble codes: 36 (map voltage low).
1999 Chevrolet Astro 4.3L Poor Idle Quality, Misfire VIN: 1GCDM19W4X
well this nightmare from hell is fixed after haveing some time to run some test compression good 150 lbs accros the board dist cap ac delco also plugs ac delco did injector ballance test and found that not only cyl # 4 injector bad cyl # 1 2 3 6 no good onl... Trouble codes: P0300, P0304.
2000 Chevrolet Express 3500 5.7L Filling with fuel VIN: 1GCHG35RXY
Thanks for all the replies after inspecting the filler neck looked good and straight with no kinks unhooked canister and tried to fill tank still had the same problem removed filler neck and found vent tube up tight to module reinstalled filler neck and filled...
2005 Chevrolet Impala LS 3.8L radio VIN: 2G1WH52K25
thanks to all who replied.turns out the origional radio was ok. the car had been underwater and the connection under the carpet between the seats for the amp was rotted apart.
2002 Pontiac Grand Am GT 3.4L No Start VIN: 1G2NF52E42
It's finnally gone - checked and rechecked, but in the end found that fuse for the a/c - oil pressure circut bad replaced wire under pdc and replaced fuse and car starts everytime has been with the customer for 1 week and no problems, i had checked the fuse bu...
2000 Saturn SL2 1.9L No Start, no com at dlc for ob VIN: 1G8JW82R5Y
to calvin thank you rodgre and carl ive tryed your segudtcions and replaced 3 moduels with no luck .i think it might be the dia and securty moduel how ever the customer opted out so we will not know . iam sorry iam not more correct in my spelling thanks for yo... Trouble codes: U2105.
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next