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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 4, 2006
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Open Help Requests for GM
Help Request Answers
2002 Buick Century Custom 3.1L oil fill cap VIN: 2G4WS52J32
I have a car from a local used car lot that he just has taken in on trade and there is clear moisture droplets under the oil fill cap. I have pressure tested the cooling system and found no leak down. This is a clear droplet and does not appear to be coming fr...
2000 Cadillac Catera 3.0L Misfire VIN: W06VR53RSY
Hi everybody : This vehicle is from auction,the service engine soon light is on and it got two codes : mass airflow sensor circuit problem,and random misfire. Look at the mass airflow sensor and found the sensor is unplug,plug it back in and the engine runs v...
1990 Chevrolet K1500 Cheyenne 5.0L speedo VIN: 1254689898
all info here is incorrect, this is home built vehicle in progress. 1970 Dodge pickup body on 1991 chevy 1500 drivetrain, problem is trying to hook up speedo, trans is vss drive, where the cluster obliviously is mechanical dirven by a cable of course. Can any...
1995 Chevrolet C2500 5.7L MIL Lamp on VIN: 1GTGC4589I
Hey guys, I've got this truck that developed two problems after some aftermarket exhaust work was done. The work performed was to eliminate the cat. convertor and install headers and dual exhaust replacing the single it had from the factory. The single wire o2...
1996 Chevrolet C1500 5.7L No Start VIN: 1GCEC14RZT
Thanks for taking the time to read this request. Vehicle will start if gas is poured into throttle body. Don't have access to fuel pressure gauge but checking pressure at the test port seems to be adequate. Could this be as simple as an open fuel pump relay?
1999 Chevrolet K1500 Suburban 5.7L MIL Lamp on VIN: 1GNFK16RNX
Truck came in with MIL ON, found above codes, cleared and only ones that came back were for Map low voltage, datastream confirmed voltage of 1.9V KOEO, sometimes be as low as .2V, doesn't seem to matter if vehicle is running or not. 5V reference to sensor good... Trouble codes: P0107, P0108, P1106, P1107, P0404, P0101
2000 Chevrolet Cavalier 2.2L drl VIN: 1G1JC1240Y
No Daytime running lights,relay clicks on,lights come on for about 3-5 seconds,relay starts to click on and off,DRL go off and the service vehicle soon light comes on. Clear codes(B2600,B2601)turn key off,turn key back on,same results as above,any help would b...
2000 Chevrolet Astro 4.3L Hydro-boost VIN: 1GNEL19W8Y
Customer states that at times the brake pedel is very hard to depress and vehicle is hard to stop. Customer also feels that if he releases the brake pedel and depresses again while "wiggeling" brake pedel it will stop normally. Very intermitent but can not be ...
2000 Chevrolet Tahoe 5.7L 2-3 shift VIN: 12CSERSDN2
if ran to 40mph and mill is reset, vehicle runs perfect...but when brought to 0mph and accelerated at 18mph it shifts, 30-35 no shift...then you get mill with po758...now this is wierd if you activate 1=4 sol u see power then ground(comand)on 2-3 ground all th...
1996 GMC K1500 Suburban 5.7L take off VIN: 1GKFK16RZT
When you stop at a light this thing will take off in 3rd gear(only hot)if you manually shift it into 1st it will then shift into 1st. We have no codes and have changed the range switch. Thanks in advance! * Rebuild 40,000 miles ago
2000 GMC C6500 7.4L aux light on VIN: 1GDG6H1B1Y
this truck is really being a pain any help would be graetly apperiacted,the aux brake light light is on at all times,with parking brake on and off, we ran the tests for parking brake module and installed new one,no help, next replaced a sensor in power brake b...
2001 GMC Sierra 1500 SL 4.8L MIL Lamp on VIN: 1GTEC14V81
vehicle came in with mil light on. found po171 and po174 codes. changed fuel filter and pressure tested system. fuel filter plugged. checked for vacume leaks, non found. local dealer informed us on intake gasket leak. replaced gasket and still have same 2 code... Trouble codes: P0171, P0174
1990 Oldsmobile Cutlass Supreme International 3.1L Stall VIN: 1G3WR54T3L
TIA for your assistance on this one. The car came in with a stalling on acceleration from a stop & MIL off & no code stored in computer. Visual inspection found fuel pressure regulator leaking gas and air inlet boot damaged. We replaced both. Stalling problem ...
2001 Oldsmobile Alero GL 2.4L Misfire, MIL Lamp on
1992 Pontiac Grand Prix SE 3.1L No Start, Stall VIN: IG2WH54T8N
Hello Everyone, Thanks to everyone in advance for helping me. I have a no start condition. When the engine is cranked, the only way to keep it running is to hold the gas pedal about a 1/4 way down, then dies after 10-20 seconds. The scanner shows code 22, TPS ... Trouble codes: 22 (TPS Voltage low)
1993 Pontiac Trans Sport 3.8L Auto door locks VIN: 1GMDU06L1P
Customer complaint is the Auto door locks stopped working when put in gear and turning veh off. Mitchell says auto door lock module near base of RH A-piller. I've found the key less entry module and relay in that area, but can't find Auto door lock module. I w...
1993 Pontiac Grand Am SE 2.3L No Start VIN: 1G2NE5436N
vehicle was towed in. no spark, no injector pulse. scoped crank sensor with lab scope. nice 7 x pattern. check all powers and grounds. checked related wiring from module to comp. and injectors wiring. have no 2 x signal at module. replaced module. still no 2x ...

Fixes & Summaries for GM
Fix/Summary Answers
1992 Buick Regal Custom 3.8L Coolant VIN: 2G4WB54L5N
Radiator has engine oil cooler built it as was brought up by a few techs. We replaced the radiator and all seems to be OK. Thanks. Mike
2002 Buick Rendezvous CX 3.4L Battery Light VIN: 3G5DB03EX2
This car is finally fixed !!! Remember she is 200 miles away so I never seen the vehicle but I convinced her to go to a GM dealer and after 4 trips they finally fixed it. Trip 1 they reflashed the BCM...20 miles later battery light comes back on...drives back ...
2002 Cadillac Escalade 6.0L abs VIN: 1GYEK63N42
Hi everybody : I got 7 replies,one saying that removed the front hub and clean the reluctor wheels,I did that and the problem fixed. Thank You
1978 Chevrolet Camaro 5.7L Cylinder heads
Thanks for the responces, using everybodies advice we are going to fire the engine on AC R43T plugs and then read them for proper heat range when he drives it.
1993 Chevrolet Astro CL 4.3L Hesitation, Surge, Cuts out VIN: 1GNDM19W5P
i have checked fuel valume and it was fine, i changed the fuel injection (spider) assembly and that fixed the problem. the injector was giting warm then starting to srhort.
1998 Chevrolet C1500 Cheyenne 4.3L Misfire, MIL Lamp on VIN: 1GCECI4WXW
thre are three basic issues involved in this fix. #1)if the cam timing is off, there is a reason. these distributors are not adjustable. if you auger out the hold down, you are masking another problem. i would only advise this as a last resort if the customer ... Trouble codes: P0300 (random misfire detected), P1345 (ckp sensor/cmp sensor correlation).
2001 Chevrolet S10 4.3L Poor Idle Quality, Misfire VIN: 1GTDT19W21
well I was chasing something that led me for a loop as far as the droping voltage on the o2 b1s1 it is the nature of the beast with ngk o2 sensor the other sensors were OE thats why they reacted the way they did. So all in all after I figured that one out ran ... Trouble codes: P0300.
2003 Chevrolet Silverado 1500 HD LS 6.0L loses power VIN: 1GCGC13U23
I haven't got the customer to return again. It seems that there is a problem with the yellow wire near the throttle assy under the hood. I will try to check this again if he comes in. Trouble codes: P1516 (Throttle Position out of Range).
2004 Chevrolet S10 LS 4.3L air delivery VIN: 1GCDT13XX4
Well this one is fixed. The cure ended up being replacing all the actuators. Transfercase oil was getting in the vaccum lines and destroyed the actuators. Thank for all the help.
1993 GMC Jimmy SLE 4.3L Poor Idle Quality, Surge, Misfire VIN: 1GDCT18ZP0
No vacuum leaks were found ,Customer elected to have the engine rebuilt So we will see what happens. The only thing we saw was there was some damage to the camshaft and distributor gears
1998 GMC K1500 Sierra SL 5.7L In the truck VIN: 2GTEK19ROW
Sorry everyone, my update for this truck problem was the fix post. I put the fix in the wrong catagory.
1998 GMC Jimmy SL 4.3L Broken wire VIN: 1GKDT13WK5
You name it I checked it... Turning radius/stops, torision bar hight adjustment, nothing loose, wire routing is EXACTLY the same as the left side. The ONLY difference is the stiffness / elasticity of the wires. The new SFK HUB wire (which I installed today) ap...
1999 Oldsmobile Intrigue GLS 3.5L headlights VIN: 1G3WX52H9X
Thanks to all the replies. I went straight to the fuse panel and found low voltage. tested the wires out of the ignition switch they also had low voltage. I put the switch in and that fixed the problem.
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