Join Now
International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 17, 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
1998 Cadillac DeVille 4.6L Misfire VIN: 1G6KD54Y1W
hello all im just about bald on this one i have done compression test 170 being lowest and 195 being highest lookest at o2 sensor voltages maf sensor readings map sensor readings pulse width coolant temp sensor and ait temp car is running rich and dont sprayed... Trouble codes: P0300
2000 Cadillac Catera 3.0L Poor Idle Quality, Cuts out VIN: W06VR54R2Y
this bugger runs like shit first thing in the morning. after the coolant warms up over about 140 f it runs a lot better. in the beginning you can't accelerate and when you push the pedal it pops and wants to stall. the son who drives it keeps running it low on...
2004 Cadillac SRX 3.6L Poor Idle Quality, MIL Lamp on VIN: 1GYDE63764
2 weeks ago, driver complained of ce lite. found code p0341. cleared code, light didn't come back on so gave to owner to drive. 3 days later light came on-p0341, installed new intake cmp b1 and started car 4 times to put light out. now, 150 miles later, light ... Trouble codes: P0341 (intake cam position sensor - bank 1)
1995 Chevrolet Blazer 4.3L Knocking VIN: 1GNDT13W05
Need some advice.I have a 1995 S-10 blazer 4.3l W engine. Starts and runs fine. After vehicle reaches operating Temp. Oil pressure drops to ZERO and engine begins to knock.--Replaced oil pump and no change, still doing exact same. What suggestions does anyone ...
1997 Chevrolet Cavalier 2.2L Accessories VIN: 1G1JL1245V
Hello everyone. I've got this car that has communication problems. There is a p1601 code cannot communicate or PCM over temp. Also the cust says if you hit a bump or go over rail road tracks lights come on or go out. There is also communication codes for the b...
1998 Chevrolet Blazer 4.3L fuel gauge VIN: 1GNDT13W7W
Hello all. 98 Blazer has no codes. Fuel gauge shows empty. Scanner data shows fuel level at 42%. We can joist the blazer back and forth and see the percent move. The fuel sender inputs to the VCM. Thats why I see the percentage of fuel on the scanner.We are us...
1999 Chevrolet Blazer 4.3L RF wheel (ABS) VIN: 1GNDT13WXX
This vehcile originaly came in 01/2006 with ABS light on. Wiring to sensor (pigtial on hub assy) damaged. We replaced hub & bearing assy. 04/2006, ABS light on again due to erratic speed readings at RF. Replaced bearing assy. Today it is back with the same...
1992 GMC C1500 Sierra SLE 5.0L Hesitation, Surge VIN: 2GTEC19H9N
1992 GMC Jimmy SLE 4.3L No Start VIN: 1GKDT13Z9N
truck came to shop for no start. 6-months ago. we diagnosed weak coil had very little spark from coil. we replaced coil & started fine test drove ran fine. customer comes & gets it 2 week's ago. never made it off lot. has no spark at all now. did start 1 time ...
1998 GMC Jimmy SL 4.3L Battery VIN: W6V2551872
Picked up this Jimmy after tranny was done , this problem has been existing for 2 years I have been told. Battery goes dead over night. Full battery drain (at this time battery voltage is 10.98 Volts), alt is charging O.K. Before someone calls me names, I am p...
2005 GMC Yukon XL 1500 SLE 5.3L 1st gear VIN: 1GCEK11111
i have a problem, if you roll off from a stop without using the accelerator pedal, and than roll into the throttle it seems to slip and than it bangs into 1st gear, after that all is well, no other problems. it is very intermittant, 4 times in 4 months, thanks...
2003 Hummer H2 6.0L side steps VIN: 5GRCN23U04
HI there , this Hummer Has an intermittant fault where you open the rear doors and the side step does not come down. when we checked it it was only the left rear door. the interior light comes on and the body computer shows that the door is open. with the modi...
1987 Oldsmobile Delta 88 Royale Brougham 3.8L No Start VIN: 1G3HY5438H
Need some help on this one, Engine will try to start & sometimes does, but dies right away. Before replacing crank & cam sensor it would not start at all. Have intermitent spark off/on while cranking & when dies. Followed AllData to possible ECM. Old TSB issue...
1996 Oldsmobile 88 Royale 3.8L starter circiut VIN: 1G3HN52K3T
hey guys, got this car in the other day and it doesn't crank. tested battery, it's hot. no ignition signal to solenoid. it's got a pass key ignition lock cylinder but also has an aftermarket alarm wired into it. i can crank it over at the solenoid but it only ...
1999 Oldsmobile Aurora 4.0L oil light VIN: 1G3GR62C0X
intermittent "red" oil can light along with erratic oil pressure reading on driver information center. removed, oil pressure sending unit located at oil filter addapter housing. pressure reading with analog "shop" gauge is within spec at idle and 2500 r.p.m.. ...
2000 Oldsmobile Silhouette Premiere 3.4L Freon lines VIN: 1GHDX13E8Y
Hi all: Got this Silhouette that sprung a leak in the AC system. The compressor was very noisy, so we replaced it first, then began looking for the leak: found it in the hi pressure line feeding the rear AC, back by the axle where the parking brake cable rubbe...
2001 Oldsmobile Alero GL 2.4L engine VIN: 1G3NL52T71
This 2.4l quad4 engine has a loud tapping/rattling noise. It is slight when idling, but much worse at higher rpms. It sounds like a valve train/lifter noise but seems to resonate all over the engine. The oil pressure guage fluctuates about 10psi when idling (l...
1995 Pontiac Bonneville SE 3.8L MIL Lamp on
has any body ran into a ground or computer problem setting a map code have replaced map twice and code comes right back immediately. map reading is 2.5 volts at idle drops to 1.7 under load.
1995 Pontiac Firebird Formula 5.7L No Start, Stall VIN: 2G2FV22P7S
hello all, this vehicle came in about 6 months ago with a hot stall/ hesitation. after cool down car would run fine. after much testing found bad dist (opti-spark). replaced opti-spark pick up and did major tune-up (plugs and wires and coil). car ran fine with...
1997 Pontiac Grand Prix SE 3.8L suspension VIN: 1G2WJ52KXV
this car shakes under heavy acceleration. feels like a cv wobble. i have tried three sets of new aftermarket axles with no change. another problem which may be related, it clunks loud from front suspension when you launch from a stand still, then again when yo...
1998 Pontiac Sunfire SE 2.2L Surge, Misfire, MIL Lamp on VIN: 1G2JB5241W
If anyone has seen repair or screen kit I would be greatful Thanks Darren Trouble codes: P0404 (E.G.R pintle pos. open)
2000 Pontiac Sunfire SE 2.2L No Start, Cuts out, MIL Lamp on VIN: 1G2JB524XY
hello all,i have had this sunfire in the shop previously with a cutting out problem and will no start in cold weather problem. retrieved trouble codes and traced them to a pcm problem. i replaced computer. a couple of weeks later the customer came back in tell... Trouble codes: U1000 (no state of health from module), U1040 (loss of ebcm/ebtcm communication), P631, P632
2003 Pontiac Montana 3.4L ABS Module & Master Cylinder? VIN: 1GMDU03E72
Vehicle arrived with no brake pedal. Customer installed own brake master cylinder. Brake pedal goes to the floor? After bleeding system, manually and automated. No Codes. Replaced Master cylinder w/ new one, and replaced ABS -BPMV (used), with correct part num...
2002 Saturn Vue 2.2L No Start VIN: 5GZCZ23D63
i have a saturn vue with no fuel preasure, there was power back to the fuel pump. we dropped the tank and found the side of the tank (left side) with the electric pump had no fuel in it, the right side had was over half full, my question is how does the fuel t... Trouble codes: P0378
2003 Saturn Vue 3.0L MIL Lamp on VIN: 5GZCZ63B42
This Saturn is setting mentioned codes very intermittently.I have read TSB # 03-06-04-043 and checked TB and connector. I drove vehicle for one week and could not duplicate problem. I have checked and moved wiring harness with no effect. I found a similar post... Trouble codes: P0121, P0221, P2135 (correlation tp 1 / tp 2), P1779 (torque delivered signal)

Fixes & Summaries for GM
Fix/Summary Answers
1996 Buick Skylark Custom 3.1L Theft system VIN: 1G4NJ52M3T
Sorry it has taken me so long to respond but the customer was waiting to have the money to complete the repair. The instrument panel (IPC)took care of the problem. I did find the ABS module was corroded and under 1 inch of water also. Disconnected the module a...
2001 Buick Century Custom 3.1L interior lighting VIN: 2G4WS52J21
I didn't get much help on this one. One guy suggested disconnecting the RAP relay and checking the circuits there, which I had already done. Another suggested checking the vanity mirrors. This one has vanity mirrors, but no lights in them. There are however, l...
2002 Buick Rendezvous CX 3.4L No compressor engagement VIN: 3G5DB03E32
Wow an special thank you for all who replied to my post!! Ninty percent of the replys where correct... a replacement of the Body control module, and reflash at your local GM dealer fixed the problem. We have the mastertech with TIS2000 programming software, bu...
1999 Cadillac Catera 3.0L Surge VIN: W06VR52R3X
I'm sorry but I must go in for surgery tomorrow and will not be able to finish the repair on this for now but the help that was recieved was great. The first thing I'm going to do is to smoke the engine and check for vacumm leaks and proceed from there. Once a... Trouble codes: P0411, P0300, P0301, P0303, P0305.
1967 Chevrolet Impala 327CID Reverse
First I want to thank everyone who replied to my help request so quickly. I appreciate everyone's efforts and suggestions very much. Reverse would not work because the earlier rear pump case was not compatible with the later valve body and governor support hou...
1985 Chevrolet Camaro Berlinetta 5.0L MIL Lamp on VIN: 1G1FP87F1F
Thanks to all that replied. However, upon further inspection this car was changed with a 1986 ecm. 1985 had a burn module for the mass air flow. 1985 was the only year for the burn module at a cost of $985.00. Car was rewired with 1986 relays etc. Good idea bu... Trouble codes: 35 (throttle switch shorted).
1997 Chevrolet Camaro 5.7L no crank VIN: 2G1FP22P8U
I would like to thank everyone that replied to my problem here. Russ from New Jersey and Tony from North Carolina were dead on with thier reponse the problem was the actual ignition electrical switch,I removed the plugs to inspect and one connector had been bu...
1997 Chevrolet Venture 3.4L child safety VIN: 1GNDUO6E1V
I had found the info that I needed by a friend of a friend who works for GM warranties. She had ran a VIN search and found that the tether bolt was to be installed where the third row seat latches to the floor. Each seat has a dedicated hole to attach the bolt...
1993 Geo Metro 1.0L Stall, Misfire VIN: 2C1MR246XP
thanks for all of the info. it did help me althrough the car is not fixed. as school is closing for the summer the customer is going to pick up the car. i do not know if he will bring it back when school opens next fall. Charlie C.
1994 Pontiac Grand Am SE 2.3L Cuts out VIN: 1G2NE5339R
After yesterday's updated Rick [...] responded - 2.3 quads dont like aftermarket O2 sensors, so we had been using Bosch O2 sensors all along. Never ever had a problem with any vehicle. Installed GM original replacement and bingo bang on. Other information....
1994 Pontiac Grand Prix SE 3.1L rear brake wear VIN: 1G2WJ52M4R
Fix was replacement of the L/R hub assembly w/ internal wheel speed sensor. This permitted ABS computer to 'see' 4 wheels turning; THAT allowed the rear brakes to begin working properly & ABS now actuates noticably under heavy braking(normal). No ABS light now...
1997 Saturn SL1 1.9L Cooling system VIN: 1G8ZH5288V
Thanks for all the help. Pulled the valve cover and cam sure enough #4 cam tower was cracked. Saturn declined to repair for client under warranty due to age(79K miles)but 10 years. Client left car with us as she did not wish to put any money into vehicle. I de...
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next