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Prev Professional Automotive Repair Technical Discussions for February 9, 2008
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Help Request Answers
1988 Chevrolet C3500 Cheyenne 7.4L 4L80E Conversion VIN: 2GCHC39N1J
Hi guys, I'm doing a 4L80E conversion on this 1 ton dually 2wd truck. It had a manual trans. I am looking for a stand alone control system with wiring for this. I would like to talk to somebody who has experience with a similar swap. Some of the challenges tha...
1999 Chevrolet C1500 Suburban 5.7L No Start VIN: 3NGEC16R1Y
replaced pcm, crank sensor, distributor. no change. any help or suggestions appreciated, thanks Al
1999 Chevrolet S10 4.3L water pump gasket failure VIN: 1GCCT14W6X
Cannot get waterpump gaskets to seal after replacing intake gaskets and waterpump. Tried orange sealant, gasket appears to split and squeeze out. Then tried yellow weatherstrip adhesive(with blue teflon type gasket). Tried locktite on bolts. Gasket always appe...
2005 Chevrolet Colorado Sport 2.8L Misfire, MIL Lamp on
Truck came in with po300,checked misfire counters #3 was misfiring the most.So I changed the #3 coil and did a tune-up.It seems to miss when you first start it up and when you rev it up.Customer said gas milage improved after tune-up.There is a TSB for bad val... Trouble codes: P0300
1998 GMC Jimmy Envoy 4.3L security system VIN: 1GKDT13W6W
thanks for the help in advance, after replacing the passlock sensor and the ign tumbler I ran through the relearn procedure and the jimmy starts and runs fine but the security lamp says on all the time, I checked with customer and the lamp had been on for a wh...
2003 GMC Sierra 2500 HD SLE 6.6L No Start VIN: 1GTHK29103
This truck has a hard time starting cold, I did get it to start the other day but it took 5-6 times before it would start. The truck sat outside for 2 days in about - 8 degress celcius and now I can't get it to start at all. First off I know very little about ... Trouble codes: P1094
2005 GMC Sierra 3500 SLE 6.0L speedometer reads too high sometimes VIN: 1GTHK33U25
customer says dash lights shut off and speedometer goes crazy he thinks truck lacks power when it happens but it only happens once in a while never when truck is here. customer wanted fuel filter replaced but cannot find fuel filter does anyone know if this tr...
1993 Oldsmobile Cutlass Supreme 3.1L Poor Heating VIN: 1G3WH14T3P
This 93 Cutlass Supreme heats poorly. It has automatic climate control. Another shop replaced the heater core because it was leaking inside the vehicle. Customer states he can deal with the heating if the outside temp is greater than 20 degrees. 1st thing foun...
1999 Oldsmobile Bravada 4.3L Misfire, MIL Lamp on VIN: 1GHDT13W4X
OK,I think i should have left this one alone but i did had been looked at by someone else and the customer told it had a burnt valve,i was asked if i wanted to fix it-without seeing it i suggested just get a head and i'll install it and then it'll go qu... Trouble codes: P0300 (p0440-), P0440
2002 Oldsmobile Silhouette Premiere 3.4L Misfire VIN: 1GHDX03E72
Van was running fine for the customer on wednesday. Then all at once it started to run bad, and the check engine light came on. I scaned it, and it came up with a #3 misfire. I put an inline park tester and found spark from the coil. Replaced that plug and wir... Trouble codes: P0300, P0203, P0440
1989 Pontiac Grand Am LE 2.3L Excessive Emissions VIN: 1G2NE54D4K
this is a ca cap vehicle and seems to have had alot of work done before getting to me. new cat, o2 sensor, valve job, ignition module, computor and i had to change coils(lost spark to 1 and 4 cyl.during diagnoses. found computor subtracting fuel (low integrato...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick LeSabre Custom 3.8L pcm/ vats VIN: 1G4HPS2K5V
Eureka, I've found it! We were all wrong. I was able to fix this car mainly because I was able to finally get the vehicle here while it was acting up. Remember, the security lamp never lit when the PCM was disabling the fuel and setting the "Incorrct fuel enab...
1995 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W1S
we replaced the module with an ac delco module and vehicle is still going good so i am calling it fixed thanks to all Trouble codes: 1351 (Electronic Spark Timing EST Output High Or Pulses Detected When Open).
2000 Chevrolet Malibu 3.1L Poor Idle Quality, MIL Lamp on VIN: 1G1ND52J1Y
I should have remembered this, but my old mind wasn't working. Alex [...] had the fix nailed when he suggested disconnecting the cam sensor and see if the 12v reference came back, which it did. After pulling the power steering pump I found the insulation o... Trouble codes: P0336.
2002 Chevrolet Tracker ZR2 2.5L pump VIN: 2CNBJ73472
2000 GMC Safari SL 4.3L Poor Idle Quality VIN: 1GKDM19W8Y
Thanks to Mike, Brian, and Rocky for replying. Brian gave me the piece of info I was missing on this one. I knew the iac had a full time power supply and the ecm used the ground side to control inward and outward movement. What I didn't know was it was an inj...
2003 Oldsmobile Alero GX 2.2L no start VIN: 1G3NK52F33
SUCCESS!! The problem with this car was in the left fusebox. Thanks to Jim who got me thinking, when this car was towed in, I noticed the left fusebox has serious moisture in and around it with signs of rust on the mounting bracket. The serial data line, and o...
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