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Prev Professional Automotive Repair Technical Discussions for February 20, 2008
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Open Help Requests for GM
Help Request Answers
1995 Buick Riviera 3.8L starter VIN: 1G4GD2218S
car was originally hacked up, installed new ign switch and harness and tumbler. nice smooth movement now but no crank lol. my two wires for the pass key were in the black coonector not grey as mitchell states there is no rome in the grey one.i also have a two ...
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2005 Buick LeSabre Custom 3.8L No Start VIN: 1G1HR54KX5
car will not start after sitting overnight. Has spark and good fuel pressure. Once you get the car started it will run fine all day even when it gets cold only has problem after sitting all night. No engine codes. Coolant temp reading good. Theres a tsb we got...
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1986 Cadillac Cimarron 2.8L Poor Idle Quality, Surge VIN: 1G6JG69WXG
This car is killing my mind! It came in 2 weeks ago. Hasn't left! It has a closed loop surge that will cause engine to actually die. The O2 voltage shift is slow. When in .900 range, the pulse width steadly drops waiting for the O2 responce, that doesn't happe...
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1997 Chevrolet K1500 Suburban 5.7L Misfire VIN: 3GNFK16R3V
cxhecked entire system and unable find the problem. the vehicle will have an intermittant misfire at adle when stopped under a load while the brake is applied. only at idle. any help with this one would be appreciated. was unable to reproduce customer complain... Trouble codes: P0300 (random misfire)
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1998 Chevrolet Astro 4.3L intake manifod VIN: 1GNC12ACK2
hi gm techs.I have a 1998 chev. astro van in the shop.PO 125 code.check engine light is on.coolant takes to much time to heat up.Did cooling system pressure check and found lower intake manifold leaking coolant.Do these 4.3 liter engines have a history of leak...
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1999 Chevrolet S10 2.2L MIL Lamp on, loss communication VIN: 1GCC5144XX
vehicle came in with injector circuit code. #4 inj. hung open ecm inj. #4 holding replaced ecm relearned security & crank sensor. problem solved. now no fuel guage, rear abs sensor/speedometer, battery light is on, other guages work. checked all fuses ok. than... Trouble codes: P0405, P0502, P0713, P0753, P0758, P1602
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2001 Chevrolet Blazer LS 4.3L Misfire, MIL Lamp on VIN: 1GNDT13W51
This is an MTA vehicle,so it is well maintained.the shop could not figure out the reason for the miss so they sent it to me.I scaned the vehicle got P0300 and P01345, data showed cyl 5 and 6 misfiring and cam retard at 1000rpm at -21 deg.I noticed the distr. w... Trouble codes: P0300 (mult cyl missfire), P1345 (ckp/cmp correlation problem)
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2002 Chevrolet Impala 3.8L No Start VIN: 2G1WF55K82
hi every one i have a wierd one i just wanted to get some idears before i get into it the car came in with a dead battery we charged the battery car started the ck engine and securty light was on along with the charg light the radio was locked ck charging syst...
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2002 Chevrolet Venture 3.4L No Start, Stall, Misfire VIN: 1GNDU03E62
Hey guys thanx for the help in advance, This is my son's car and when he was driving it it was missing. Then it lost power and died. I checked misfire hist. and #1 was the only one missing. I checked data when cranking,I have a crank signal but no cam sig. Th... Trouble codes: P0300
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2004 Chevrolet Silverado 1500 5.3L No Power VIN: 1GCEK19T34
This truck came in with the complaint of will not pull up a grade from a stand still. Once the truck starts to move it runs fine. There are no codes in the computer system and fuel trims appear normal. There are no misfires in history. If you brake torque the ...
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2005 Chevrolet Silverado 3500 6.6L frame VIN: 1GBJC39205
Not excluding anyone however this would be directed at the suspension/frame members. I have a loss to a 3500 Chev which has a Jerr-Dan two car hauler installed and the VIN indicates an HD option however it is an INdependent front suspension and the actual fram...
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2000 Oldsmobile Intrigue GX 3.5L Hesitation, Misfire, MIL Lamp on VIN: 1G3WH52H8Y
Hello all and thanks in advance for reading this post. This 00 Intrigue goes dead lean (both O2's read lean when it acts up, approx. 40mv) under load (intermittently) and loses power/hesitates, it will eventually come out of it, but for the most part it reads ... Trouble codes: P0131 (O2 signal low B1S1), P0137 (O2 signal low B1S2), P0300 (random cylinder misfire detected)
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1998 Pontiac Sunfire GT 2.4L air in hydraulic system VIN: 1G2JD12T6W
Help!!! I have a 98 sunfire that keeps coming back with air in the hydraulic clutch system. We replaced the slave (Fenco)and master cylinder(Napa)originally when we did the tranny job. Then when it came back a week later with air in the system, we replaced t...
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1999 Pontiac Grand Am SE 3.4L Fuel Gauge VIN: 1G2NE52E6X
Hi there & thanks in advance.I replaced a 3.4 engine on this vehicle only for the customer to bring it back for fuel gauge & odometer inoperative after repair.Sender,IPC,BCM & PCM have all been replaced..Im not seeing the engine replacement & these two problem...
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Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick LeSabre Custom 3.8L No Start, Stall VIN: 1G4HP52K2V
Many replies pointing me in the direction of the crank angle sensor. Seemed reasonable. I got the special J tool to remove the dampner/pulley and replaced the made in mexico CAS. Still died. The PCM was giving the odd fan jet outlet temps for start up (4000F+...
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1995 Chevrolet Blazer 4.3L No Start, Cuts out, Stall VIN: 1GNDT13W0S
WELL THIS ONE IS FIXED AND LIKE NORMAL ALOT OF THE REPLIES DID NOT PAY ATTENTION TO WHAT WE HAD ALREADY CHECKED. ALL THEY OFFERED WAS COMMON 4.3 FAILURES THAT DID NOT EVEN APPLY TO THE PROBLEM. AS FOR THE FIX, HERE IT IS. WE HOOKED LAB SCOPE TO A COUPLE OF REL...
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1999 Chevrolet Astro 4.3L Poor Idle Quality, Hesitation, Stall, MIL Lamp on
Thanks to everyone who tried to help with this one.As it turns out,the #6 piston was damaged during crank relearn, causing power loss & knock.It isn't easy to put an engine in one of these things,but it's done and out of my life.I hope I don't see another one ... Trouble codes: P1345 (cam sensor sync problem).
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2000 Chevrolet Astro 4.3L Pinion shim VIN: 1GCDM19W2Y
I would like to thank all who replied,all with equally interesting information.What i found out,and what i went with was to set the rear up using the 7.5 guage block from the Kent-Moore pinion depth set.The 7.5,7.5/8,and the 7.625 differentials all use the sam...
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2000 Chevrolet S10 4.3L No Start VIN: 1GCDT14W6Y
Well it is finally fixed. I want to thank everyone for the great input. The final fix was diesel in the gas. It had caused the wires and the coil to go bad trying to run off of it. Thought it was fixed when we replaced the fuel with good gas but had ruined ano...
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2001 Chevrolet Silverado 3500 6.6L No Start, MIL Lamp on VIN: 1GBJK39111
We checked the air intake heater and it was intact so we talked to the customer to authorize tear down and inspect time. Heard back today that they do not want to fix the vehicle. We do not know what happend with this one. thanks for all the help. Trouble codes: P540, P089, P093, P102, P463, P571.
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2002 Chevrolet Silverado 2500 6.0L transfer case VIN: 1GCHK29U22
Sorry for the late post. Replaced the transfer case with a reman unit. Did not take the old one apart to see what busted, however the oil was black and chunky.
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2005 GMC Yukon SLE 4.8L Electronic VIN: 1GKEK13V65
The customer has not had any further problems with this vehicle. I believe that for whatever reason (possibly the alternator overcharge) the encoder was recieving faulty information. If the problem reoccurs I will repost.
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2002 Oldsmobile Silhouette Premiere 3.4L Mechanical VIN: 1GHDX23E62
The oil pressure exceeded 80 psi.We dropped the oil pan (yes,we removed the subframe),& found the pressure relief stuck.The pump was replaced,the screen & pan cleaned,All is good now,& we cannot blame the Quick lube place either.Thanks for all the help. Matt.
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1999 Pontiac Grand Am SE 2.4L MIL Lamp on VIN: 1G2NE52T8X
Thank you Allen from North Carolina. I beleive it was the fuel tank pressure sensor that was at fault. It comes with the module, which incluides pump level sensor and press. sensor. The fact that there was a noise heard from the rear lead me to believe the f... Trouble codes: P0452, P0453.
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