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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 26, 2007
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Open Help Requests for GM
Help Request Answers
1992 Buick Park Avenue Ultra 3.8L Cuts out, Stall, MIL Lamp on VIN: 1G4CU5317N
Hi iatn Buddy's, could use some advice on this one. customer came in with a complaint of stalling, I couldn't get the vehical to act up, hooked up my brick and got a tps code 22, it passed the sweep test but I replaced it anyhow and cleaned the throttle and ma... Trouble codes: 22 (tps sensor circuit low), 67 (cruise controll switch bad)
1995 Buick Riviera 3.8L alternator VIN: 1G4GD2210S
no battery voltage on terminal l koeo low charging voltage full field alt everything ok
1995 Buick LeSabre Custom 3.8L Coolant Temp Reading VIN: 1G4HP52L1S
HELP!!! Customer complaint: Check engine light intermittently comes on. Temp light intermittently comes on. No relation to each other as far as when they come on. We have never actually seen temp light, but have seen check engine light. Found three codes in co...
1993 Cadillac DeVille 4.9L No Start, Stall VIN: IG6CD53B9P
this car has good fuel press.& good spark.it will light the injectors one time run for about 3 sec.then die,try to restart and have no inj. pulse.wait about 3min.and it will do this all over again.all inj.ohm out ok.have good sig.from crank sensor to dist,& fr...
1991 Chevrolet Caprice Classic 5.0L Poor Idle Quality, Stall, Misfire VIN: 1G1BN53EXM
Okay Guys this one has been a problem on and off for three weeks. I have checked all wireing and scan tool data is normal. This thing just will not idle unless you unplug the vacuum line going to the map.No I have not taken a manual vacuum pump to the map. The...
1994 Chevrolet Cavalier RS 2.2L convertor VIN: 1G1JC5447R
vehicle locks up convertor at idle and stalls the engine, (common problem for solenoid failure) customer has already replaced solenoid. Problem is still there if we un hook the wire harness to transmission. normally that would prevent it from happening, but th...
1995 Chevrolet Monte Carlo LS 3.1L Stall, MIL Lamp on VIN: 2Q1WW12M5S
The car wil start and stall sometimes, especially after a hot soak. Her original complaint was stalling after running in to the store, and a check engine light. I got the car to do this 3 times - once per visit. I have not gotten the car to set the Code 51, bu... Trouble codes: 51 (Faulty PROM/MEM-CAL)
1996 Chevrolet K1500 Cheyenne 5.0L Poor Idle Quality, Misfire VIN: 2GCEK19M2T
Vehicle came in with a complaint of poor fuel mileage and a very rough idle. Checked the computer for codes and fuel trims. No codes stored, however the long term fuel trims were plummiting. Both banks were at approx 122 when the vehicle came in. Checked the i...
1999 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W8X
Very strange no start problem. No pwr to fuel pump relay KOEO. Fuel pump works with prime connector. Replaced ign. switch (common problem). Verified correct install of switch, turned both switch and key to ACC. No comm. w/ VCM in run position, other modules co... Trouble codes: U1255 (Class 2 comm. fault history), U1301 (Class 2 shorted to batt history), B2961 (Key in ignition circuit fault history)
2001 Chevrolet Impala 3.4L suspension / steering VIN: 2G1WF52E91
Thanks to all in advance.I have vibration / wobble feels poss like a trans shudder , while turning left at slower speeds . It is felt through out the whole car and is only on left turns I have check the steering shaft and it is ok and also have check the trans...
2002 Chevrolet Impala 3.4L t.cover/oilpan VIN: 2GIWF55EX2
hi gm engine experts!is it possible to weasel out the t. cover without oilpan removal like old style sheet metal job?. i have cover loose but fear cracking cover or pan if force is applied. trying to avoid cradle and oilpan removal for cheap customer and don't...
2002 Chevrolet Silverado 3500 6.6L No Start VIN: 1GCJK33192
i have security light on all the time.bcm shows key code ok but pcm still in fail mode.tried relearn but pcm wont go into count mode.any help would be apreciated.
2003 Chevrolet Cavalier LS 2.2L No Start VIN: 1G1JF52F63
This vehicle has an intermittant no start, once in forty or fifty starts. When no start occurs theft light stays on, shift interlock will not release and computer will not communicate. There were two u codes related to open and short in communication bus (u130... Trouble codes: U1301, U1302, U1064, P1626, P1631, P1630
2004 Chevrolet Silverado 1500 LS 5.3L return hoses VIN: 2GCEK13T84
This truck makes a noise when turning left. Speed does not affect noise. The return hoses vibrate when turning left, causing this noise. Tried eliminating the cooleritself, but same result. Moving the hoses a little while turning will change the sound.
2005 GMC Canyon Z71 SLE 3.5L rear brakes VIN: 1GTDT13685
Customer complains of pulsation from rear brakes. Also, that engine feels like it is going to stall. I verified the complaint. Although the RPM's don't drop the whole vehicle shakes a little like the engine is going to stall. Happens at slow speeds - All the t...
2003 Hummer H2 6.0L No D4 or D3 VIN: 5GRGN23U83
My customer brought her 2003 H2 in with no D4 or D3 operation. In 2nd 1st and rev. everything seems normal, there are no codes and the scan data indicates that the range selector switch is working properly. We dropped the trans pan down to inspect for debris a...
1988 Oldsmobile Cutlass Calais 2.3L Stall VIN: 1G56DUN765
car starts and runs good but isant chargeing and when i hooked up my computer to it its freezeing up my screen or just no comunication at all on reading codes or data stream,what gives fix on problem to get a diffrent one,any help thanked ahead of time any que...
1999 Oldsmobile Silhouette Premiere 3.4L MIL Lamp on VIN: 1GHDX03EXX
hi group. this olds van came in the shop from other dealer. it have the code p0440 evap control system. don't know much of the history . only one code. visual check found nothing . cap gas is tightned. anyone have seen this code before. no leak with smoke mach... Trouble codes: P0440
1994 Pontiac Grand Am SE 2.3L Cuts out VIN: 1G2NE5339R
Problem: Bucks / Surge after cold start up of vehicle or after sitting for 45 minutes or more. Drive along slowly - parking lot speed and the vehicle bucks, loss of power no accel for amoment then it backs again. Possibly once or twice it will do it and then i...
1997 Pontiac Sunfire SE 2.4L Hesitation, Surge VIN: 4G2JB32T4V
Hey guys i have this pontiac sunfire that while crusing between 40-50 mph, it starts to chug/surge, while holding the RPMs at around 1500, if you accel harder it goes away, or if you deaccel it goes away, kinda of a weird one, tried a full tuneup, nothing, fro...

Fixes & Summaries for GM
Fix/Summary Answers
1987 Buick Electra Limited 3.8L No Start VIN: 1G4CX5133H
O.K., she's fixed. One time while trying to trip the sensor in my hand with the magnet it started. The female parts of the connectors must not have been touching the male spades on the sensor. It bent them all in and now she runs. Thanks to everyone who respon...
1998 Cadillac DeVille 4.6L Poor Idle Quality, MIL Lamp on VIN: KD6KD54Y8W
Thanks for all replies. We found after market TPS defective {replaced w/O.E.]and throttle plate extremely gummed up {cleaned TB and Upper intake]. No promblem now for 2 weeks.
1998 Cadillac DeVille 4.6L Electronic VIN: 1G6KD54Y8W
well i tried everyones suggestions to no avail nothing worked. my only advice to customer was to take it to cadillac and see if they could fix. thanks for everyones time and help.
2003 Cadillac CTS 3.2L Power Windows VIN: 1G6DM57N73
Thanks for the replies. Kevin from Virginia, you solved the problem. Disconnected battery terminal over night. Next morning, all worked well.
1991 Chevrolet V3500 Silverado 7.4L Poor Idle Quality, Poor Fuel Economy VIN: 1GCHV33N3M
Hi guys and girls.Big thanks to everyone who responded to my concern.Special thanks to Steve with the spec for base idle and ken for telling it like it is.I adjusted the base idle to 550 and now with the iac plugged in it seems to be better when cold and hot,(...
1997 Chevrolet Cavalier 2.2L no injector pulse VIN: 1G1JC1246V
thanks for all the replies,I guess I'm not the only one that this has happened to.I followed the gm passlock relearn to the letter but still would not start because while trying to start the car 3 times with a bad pump the pcm lost its password,so I disconnect...
1997 Chevrolet K1500 Suburban 5.7L MIL Lamp on VIN: 3GNFK16R4V
Well this vehicle has been fixed for 8 days now, all the readiness monitors passed so I am confident to say it is fixed. I would like to thank everyone for all there help and very detailed things to check. But Tony from Texas got the fix exactly right. The con... Trouble codes: P0135, P1414, P0155.
1999 Chevrolet Lumina 3.1L ABS Light VIN: 2G1WL52MXX
Well, after checking and rechecking everything, installing a new wheel speed sensor and a used EBCM, checking all connectors and using Stabilant 22 on all of them, there was no change. We decided to wrap the cable that runs from the sensor in aluminum screen t...
2000 Chevrolet Blazer LS 4.3L Pressure Sensor VIN: 1GNDT13W7Y
Thanks for all the help I rechecked the grounds and found the splice at the rear frame bad. I repaired the splice and everything works. Thanks again for the inputs. Mike
1995 Geo Tracker LSi 1.6L engine VIN: 2CNBJ1865S
The cam timing was correct with the cam dowel in the 'E' position and lined up on the valve cover with the 'E'. The problem was all the manuals I had access to said the next step was to line up the distributor to cyl. 1 and start. This info was incorrect. The ...
2001 Geo METRO 1.3L Mechanical VIN: 2C1MR52221
Thanks every one for taking the time to replie! Most of you guys where right about fuel being the problem. We jerked fuel tank down. The gas did'nt look to great but after removing gas an rinseing it out with fresh gas we noticed some scum on bottom of tank. w...
1996 GMC Safari SLE 4.3L No Start, Flooding VIN: 1GKDM19W6T
Finally found issue. Took a look at plenum cover inner side, and saw a small circular type 'rub'. This was coming from the pressure regulator nipple.What was happening was with the regulator installed with the nipple upwards, when I installed the cover on plen...
2004 GMC Envoy XUV SLT 4.2L endgate VIN: 1GKET12SX4
Thank you everyone, Roger from Texas was right, wires to endgate flexed and broke. Looks like it has been going on for a while. Here is where I got stuck, I had no bus communication from the module for the endgate on the tech2 and at that moment I had power, g...
2001 Pontiac Grand Prix GT 3.8L key switch VIN: 1G2WP52K91
problem was at shifter wiring repair!the conector had a broke wire
2002 Pontiac Firebird Formula 5.7L Clutch Hydraulics VIN: 2G2FV22G52
This is my technician's car. We narrowed it down to the hydraulics. We are planing to install the clutch hydraulics and since we're in there we are going to install a new clutch kit with flywheel.
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