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Prev Professional Automotive Repair Technical Discussions for February 17, 2009
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2000 Buick Park Avenue Ultra 3.8L wipers VIN: 1G4CU5416Y
Hope someone has seen this. Car came in with wipers not working at all. Ran function test per shop key. Washers worked so chart said to replace wiper motor. Delco was 600 dollars so customer opted to go with napa. First motor was eratic and stayed up when inte...
2001 Buick Regal LS 3.8L cv installl VIN: 2G4WB55K31
trying to put reman cv shaft on drivers side *chinese new shaft* can't get it over clip on transaxle. no one has new clip had to order. any tricks i banged on end with nut on still wont go on ? it slides on fine w/out spring clip. the shaft look identical to o...
2000 Cadillac Seville SLS 4.6L heat/ac VIN: 1G6K554Y9Y
Customer complaint of no heat or cooling. Tested for trouble codes first, code b1343 air inlet door movement. Didn't figure this would be causing no heat or a/c so started checking other things first. A/C refrigerant too low for compressor operation but did no...
1991 Chevrolet V3500 Silverado 6.2L transmission VIN: 1GCHV33N3M
Hi guys and girls.I have had some shifting problems during this winter and it seems to have settled into a rythem I can explain.This 4l80e most of the time starts off in 2nd gear and will not upshift past 3rd until it has been running for about 5 min.Then it s...
1993 Chevrolet C2500 Cheyenne 5.7L No Start VIN: 1GCFC24K5P
Hi Guys I have this truck that has a long crank time when its cold and starts fine after, the longer it sets the longer it cranks. The one thing that I have noticed is that the injectors are not being controlled and soon as the injector noid light flashes the ...
1993 Chevrolet K1500 Cheyenne 5.7L Excessive Emissions, Poor Fuel Economy
Hey guys and girls.I have this 93 4x4 pickup the runs terrible.To get it running I replaced the plugs and wires because they were falling apart.Now it runs very rich at idle and wont accel-it floods.The ecm and prom were wrong so we put in the proper ecm and a... Trouble codes: 043 (knock sensor)
1995 Chevrolet S10 LS 2.2L Excessive Emissions, Poor Idle Quality, Misfire VIN: 1GCCS1946S
Hello group, we are having trouble with this little S-10 not having any communication with the scan tool. Have tried 3 different scan tools ( Mastertech,Innova 3100, and also our Tech 2) and truck will not communicate wit any of the three. Checked wiring diagr...
1999 Chevrolet C1500 Suburban 5.7L No Start, Stall VIN: 3GNEC16R7X
truck came in with this problem. with no codes. checked fuel pressure.55 psi. we have replaced the fuel pump and filter. still has the problem. it stalled and would not restart one time but not long enough to find the problem.
2001 Chevrolet Impala 3.8L Unknown VIN: 2G1WF55K61
This Impala comes in about every week to 2 weeks with a no start dead battery. We charge the battery and everything is fine, Alternator is charging fine. The customer just lets it sit over night and then it will be dead. We think there is a parasitic drain, bu...
2001 Chevrolet Suburban 1500 5.3L ride control VIN: 3GNFK16T01
Suburban has rtd autoride. Replaced left rear shock last month. Was weather cracked and leaking. Today replaced right rear shock, was completely blown out. Wouldn't hold any air at all. Now compressor won't turn on. Check power at 30amp rtd fuse:good. Found CO...
2004 Chevrolet Tahoe LS 5.3L Steering VIN: 1GNEC13V44
customer brought in this vehicle,with a complaint of hard steering when turn right. steering ok when turning left. condition worse when appying brakes.this vehicle does have hydroboost brakes , we have checked the fluid , it is ok , brakes seem to work great. ...
2004 Chevrolet Impala SS 3.8L fuel gauge speedo VIN: 2G1WP55154
had car in for brakes today and has several electrical problems which i try to stay away from but since they are regulars here we go.fuel gauge will read full then slowly go to empty.speedo will read normal at 70 then drop to 40 then erradidly fall to zero.hea...
2004 Chevrolet Suburban 1500 LS 5.3L low range VIN: 3GNFK1GZ54
This suburban came in with no low range. When you press the 4 lo button it just flashes and resumes it previous position. I scanned it and pulled a p2771 which was 4wd lo switch circuit. I didn't see any damaged wiring so I replaced the switch. It didn't help....
2005 Chevrolet Cobalt LS 2.2L horn VIN: 1G1AL52F75
vehicle has no horn, i am looking for the horn relay. i have mitchell and motors, friend at dealer can't find it either. i need to find the relay for further testing. all manuals say it's in the under hood electrical center at the left front under the hood. un...
2005 Chevrolet Suburban 1500 LS 5.3L ride control VIN: 1GNFK16Z65
IPC message to service ride contol was on before sensor replacement. I have a Modis but can not find any level control system codes under any of the systems listed or as a sub system of the the abs, suspenion or traction control systems. There are no problems ...
2006 Chevrolet Silverado 2500 HD LT 6.0L 1-2 shift VIN: 1GCHC24U76
GM transmission help needed, This trucks slams into second gear.All other shifts good , initial engagement good , no slipping.I dont build this particular trans. it comes to me basically to diagnose if possible.No trans codes , no engine codes.If you lift off ...
2000 GMC Jimmy SLS 4.3L Left front axle VIN: 1GKCT18W2Y
The axle keeps popping out of the front differential. I don't know what else i can do. there are no bulletins that i can find. any ideas?
2001 Oldsmobile Alero GL 3.4L power topcm VIN: 1G3NK12TN9
vehichle came in for itermitten no start. found no power to fuel pump relay pin #85, power from pcm to turn on relay. went into car found no power at pcm acc fuse (power to pcm) pulled ign switch out to check power found 12v at both red wires. but upon crankin...
1997 Pontiac Grand Prix SE 3.8L Misfire
Quick question on this 3800. Got a steady misfire on #4 cylinder only. Got good fire to this cylinder(checked with oscilliscope) proper injector pulse and have swapped injectors with another cylinder.Did compression and running compression and same as other cy...
2000 Pontiac Sunfire SE 2.2L Cuts out, Misfire VIN: 1G2JB1242Y
first thanks to all replys. this vehicle was bought by a very good customer.came into the shop missing. he had alredy change plugs & wires.p0300 code was found. thought this was easy fix with new coils & change.had vehicle for 4 days .tested all igni... Trouble codes: 300 (multiple missfire)
2006 Pontiac G6 2.4L Misfire, Loss of power VIN: 1G2ZF55B46
I have checked for injector pulse, ignition fire, map sensor, mass airflow sensor and all seem to be in working order. I have scanned the vehicle, and all systems seem to be working within paramiters. The radio display comes on and off with the key in the off ...
2001 Saturn L300 3.0L bcm VIN: 1G8JW52R11
I am looking for information regarding error message "class 2 module did not verify at step 07" that I received when attempting to program a new BCM using TISS 2000 in passthrough mode. Any help would be greatly appreciated. Thank You.

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Park Avenue 3.8L Excessive Emissions, No Start, Stall VIN: 1G4CW52K2S
fuel regulator is good. engine cranking vacuum is 1.5 hg, at idle it is 18 hg and steady. also converter is not pluged.tps reading is good with no drop outs. this car does not have a map sensor. cts is has bin starting and running the last couple of d...
1985 Chevrolet S10 2.8L Stall
first i would to thank everyone who took there time to offer help i did forget to tell u guys it had a frame mounted aftermarkert fuel pump raised float up sevral times with same trouble then started going down with float level and finally stalling trouble wa...
1999 Chevrolet Monte Carlo LS 3.1L abs function VIN: 2G1WW12M1X
Well, my car is fixed. Will was right on the money. the brake lines were replaced but i did bother mentioning this because who over did those lines, they put them all in i would say factory position i was impressed. and i did ck the routing by holding the brak...
2001 Chevrolet Impala 3.4L MIL Lamp on VIN: 2G1WF55EX1
Thank you to all that responded. After many painstaking hours graphing signals from crank sensors to the module and back to pcm all looked good. we tried both crank sensors to no avail. i hate replacing parts but this one was eating my lunch so i thought what ... Trouble codes: P1374 (3x reference error).
2003 Chevrolet Suburban 1500 LT 5.3L Auto temp control and steering wheel controls VIN: 1GNFK16Z23
Well part of it got fixed today. We found that the wires were cut to the inside air temp sensor in the headliner. we repaired that and the blend doors did the self calibration and that part is fixed. Still not much help or info on the steering wheel buttons. W...
2002 Oldsmobile Alero GL 2.2L power steering VIN: 1G3N152F42
I can't believe it was that simple. We turn the steering from stop to stop with the engine off and it worked the customer has had the car for to days and it's great. Thanks a lot to eveyone.
1997 Pontiac Sunfire GT 2.4L runs rich VIN: 1G2JD12T8V
coil housing faulty new.thanks to all who replied #1 tech came back off holidays and figured it out.
2007 Pontiac Torrent 3.4L location VIN: 2CKDL73F37
Thanks to all that replied, they all said PCV valve is replaced with front valve cover assembly, not available seperately. Another option is to remove valve cover and clean it instead of replacing. We will let customer know and let him decide which way to pr...
1995 Saturn SL2 1.9L Poor Idle Quality VIN: 1G82K5270S
hello techs; the fix for this saturn was the coolant sensor +pigtail connector, all the techs were right on. saturn oem parts were purchased, now radiator fan comes on at 205deg. no more fault codes. never had a mil. lite . trans temp. fault was confusing !! t... Trouble codes: 74 (transaxle), 73 (coolant temp).
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