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Prev Professional Automotive Repair Technical Discussions for June 17, 2005
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Open Help Requests for GM
Help Request Answers
2001 Buick Regal LS 3.8L MIL Lamp on VIN: 2G4WB55K41
any ideas?? both o2's appear to be switching from rich to lean .1-.8 volts. Trouble codes: P0420
2002 Buick Rendezvous CX 3.4L possible abs module VIN: 3G5DA03EX2
This van originally came in for an abs and traction light on and occasional abs activationon on dry pavement. There was a code for a left front speed sensor. Testing showed both front sensors shorted to ground, so both sensors were replaced. Later the van retu...
1997 Cadillac Catera 3.0L antitheft VIN: WO6VR52R8V
Hello fellow techs. I have a customer that has a 97 Catera that wont start. This car is at a body shop & The car would run & drive before the battery was disconnected. I went over there & scanned it with the Tech2, it has a code 11 stored, transponder key prob...
2000 Cadillac Eldorado ESC 4.6L starter VIN: 1G6EL12Y2Y
this caddy would not start it was towed to a dealer who put a new starter in it. when he drove it home he said the car died while he was driving,so had it towed in to my shop I checked it and found out that the starter motor burned up,it smelled burnt.it would...
1994 Chevrolet G30 Chevy Van 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, Poor Fuel Economy VIN: 1GDJG31K7R
black smoke coming from tailpipe when warming up/ when driving poor fuel economy. koeo values koer map v 4.84 1.6 map prs. 29.5 11.8 temp deg. 27 27 fuel mill. 36.1 3.5 o2 reading 447 456 fuel trim 128 128 baro 29.5 29.5 bat v 12.0 12.9 spark adv. 0 32 tps v 0...
1997 Chevrolet Malibu 2.4L Poor Idle Quality, Hesitation, Cuts out, Stall, MIL Lamp on
The car have a MIL on with a P0507 code, the IAC valve was replaced and the condition still presented, the car starts fine but it stall out suddenly, all the vacum checks were performed and seems to be fine. Im going at 1500rpm and then I applied the brakes a... Trouble codes: P0507 (Rev Higher than expected)
1999 Chevrolet Tahoe 5.7L Misfire, MIL Lamp on VIN: 1GNEK12R4X
this truck came in with a p0300 and miss. I have to drive to a big hill a few miles away to get this truck to miss. lots of wide open throttle up a mile of steep grade, then back out til the tcc locks up. originally #6 would miss steadily for about 200 counts.... Trouble codes: 0300 (Random misfire), 0306 (6 misfire)
1999 Chevrolet Lumina 3.1L No Start, Poor Idle Quality, Cuts out, Stall VIN: 2G1WL52M8X
Vehicle came in with intermittent dying. Fuel pressure readings were barely min specs so replaced fuel pump module. Car left ran great for a week came back with same problem. Fuel pressure was good. It threw a cam sensor performance code. Replaced cam sensor L...
1999 Chevrolet S10 4.3L serv. 4x4 VIN: 1GM2NDCVKX
service 4x4 light on. no problem other than slow 4hi or 2hi engagement, i think its from lack of use .i charged 1hr for testing switch & test driving all works ok just slow & no 4 low but lack of use, & i blame encoder or motor.recomended more 4x4 use. but wha...
2000 Chevrolet Blazer LS 4.3L Hesitation, "pops thru intake" VIN: 1GNDT13W7Y
Hello tecks, this one has me stumped. The truck starts right up and idles great. when it is acceled. it bogs down (no power) pops thru intake. When you get to a 35 mph roll and punch the accel. it bogs, pops , clears up and takes off. This happens all the time...
2001 Chevrolet S10 4.3L Misfire, MIL Lamp on VIN: 1GCCS19W91
Vehicle came in with a coolant leak. Intake gasket was replaced. During a test drive, the mil set two codes. One was P045 (crank sensor) and P0300 (misfire). The crankshaft sensor was repaired by replacing the crank sensor and performing a GM bulletin by insta... Trouble codes: 0300 (misfire 4 cylinder)
2002 Chevrolet Trailblazer LS 4.2L compressor VIN: 1GNDT13542
this (and another,Bravada) both with dual zone, that i work on show the outside air as 0F or 6F or some other unrealistic temp and untill the thing shows 42F or above the compressor refuses to engage. this one will change as you drive from, say,85F to 0F as yo...
2002 Chevrolet Tahoe LS 5.3L MIL Lamp on VIN: 1GNEK13Z92
ses lite on with no complaints. both dtcs set after cold start at exactly 40 secs of run time. one at 550 rpm and one at 700 rpm...both less than 160 degrees f...no bult. or flashes that I can find...should this truck even be running this test here??? hope som... Trouble codes: 0171 (b1 lean), 0174 (b2 lean)
1997 Geo Metro 1.3L No Start VIN: 2C1MR2293Z
car won't start. will run if you put gas in tb. injecter will not spray gas.have fuel pressure at tb.problem started all at once.
1994 GMC Safari 4.3L transmission VIN: 1GTCM15Z9R
hello fello techs: Have a 94 safari that while driving at approximately 70 mph for about an hour will have oil leaking from vent. I have checked fluid levels and have replaced trans. filter. The transmission was recently overhauled and the torque convertor was...
1999 GMC Sierra 1500 SL 5.3L servics 4wd lamp VIN: 2GTEK190X1
Hello fellow GM technicians, I'm sorry if I'm posting this under the correct heading. The problem with this vehicle is an intermittent Service 4WD lamp. The customer told us the light has been going on & off for the past few months but has never came on for us...
2002 GMC Savana 3500 5.7L Mechanical VIN: 1GTHG35R32
This vehicle has a miss under heavy load up hill , MIL will flash and go off P0300, you cant even hardly feel the miss, which we originally thought was an ignition problem. But now we are getting low oil pressure in my opinion, its in spec per Gm but at idle i...
1994 Oldsmobile Cutlass Supreme S 3.1L door locks VIN: 1G3WH55M0R
Thanks for taking the time to look at this, I have this 94 Cutlass supreme with random power lock operation, actually they lock dozens of times by themselves while driving down the road. Here is the problem...There is a relay that operates the locks and I can ...
1995 Pontiac Grand Prix 3.4L MIL Lamp on
got this car in today it runs great and light wasent on but customer has said its been comming on.I got these two codes and all i can get from my sources is that its some kind of problem with the ign module or the pcm i hope someone has seen these codes and ca... Trouble codes: 1350 (ic est bypass error), 1361 (ic est error)
2000 Saturn SW2 1.9L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G8ZM8287Y
customer is a rural mail carrier, lots of stop and go slow driveing. vehicle has intermittent #1&2 cyl. missfire. we started with ses light on and loss of power after driveing slowly 60-70 miles. hard to start after overnite soak. we tested inj and found #3&4 ... Trouble codes: P0194

Fixes & Summaries for GM
Fix/Summary Answers
1999 Cadillac Seville STS 4.6L Power Steering VIN: 1G6KY5490X
Replaced high pressure hose. Drove car for a while to get air out of system
1994 Chevrolet S10 4.3L Poor Idle Quality, Surge, Stall, Misfire VIN: 1GCCS14WXR
Replacing the distributor fixed this beast. Apparently the magnets on the shaft were weak. Customer had replaced the pickup coil and the module, but did not actually replace the distributor. Of the many replies, replacing the cpi unit, valve train problems, an...
1999 Chevrolet S10 2.2L Excessive Emissions VIN: 1GCCS1440X
Well guys, thanks for all your help, but it turns out that the flex on the exhaust pipe where it meets the exhaust manifold, the inside flex coils were leaking. Once off you could see some the coils busted up and twisted inside. Couldn't hear an exhaust leak, ...
2000 Chevrolet Impala 3.8L Misfire, MIL Lamp on VIN: 1G34786K3Y
Thank you...recieved 8 replies. I had a broken exh valve spring Roger [...] suggestion was the one that helped me the most. even though I had even compression on all cyls,When I pulled core out of compression tester & ran eng at idle on good cyl needle jump ... Trouble codes: P0300.
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