Help with Service Engine Soon light!!
11-28-2012, 12:26 AM
#11
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fixx
Document ID# 880188
2002 Chevrolet Chevy K Silverado - 4WD
http://service.gm.com/engif/000/999/999/999999995.gif Subject:Harsh or Delayed 2-1 Downshift, Neutral Feel at a Stop, Shift Busyness, DTCs P0708, P0847, P0872, P0875, P1711, P1713 (Reprogram TCM) #02-07-30-020 - (04/22/2002)
Models:2001-02 Chevrolet and GMC C/K 2500/3500 (3/4 and 1 Ton) Series Pickup Models (Silverado and Sierra)
with Allison® Series 1000 Automatic Transmission (RPO M74)
<A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=880188&pubid=271#ss1-880188">Condition
Some customers may comment on a harsh or delayed 2-1 downshift, a neutral feel at a stop or shift busyness (excessive shifting). Upon investigation, the technician may also find one or more of the following DTCs set:
• P0708
• P0847
• P0872
• P0875
• P1711
• P1713
<A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=880188&pubid=271#ss2-880188">Correction
Reprogram the Transmission Control Module (TCM) with the new service calibrations which were available from Techline starting March 24, 2002 on the TIS2000 version 3.5 or later. These calibrations are electronic calibrations and are NOT available from GMSPO.
These new calibrations will address the following conditions:
2001
2002
Delayed 2-1 downshift at a stop
2-1 downshift quality concerns
Flare & bump on low speed coast-down and throttle reapply
Cold shift quality concerns
2-1 closed throttle neutral feel
*Shift busyness
Harsh 2-1 downshift
DTC P0708, P0847, P0872, P0875, P1711, P1713
Shift busyness
2-1 closed throttle neutral feel
*Important: 2002 Vehicles with 8.1L Engine --
If the concern is shift busyness, the PCM must also be reflashed to gain maximum benefit from the new TCM service calibration. This calibration was available from Techline starting March 10, 2002 on the TIS2000 version 3.0 or later. If the concern is not shift busyness, this step is not required.
This additional step is not required on vehicles with a 6.6L diesel engine (RPO LB7) or 2001 vehicles with an 8.1L engine (RPO L18).
<A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=880188&pubid=271#ss3-880188">Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
Description
Labor Time
K5364
Module, Transmission Control - Reprogram
0.4 hr
J6355
Powertrain Controller -- Reprogram
0.4 hr
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
http://service.gm.com/engif/000/999/999/999999994.gif WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
© Copyright General Motors Corporation. All Rights Reserved.
Does this help????
2002 Chevrolet Chevy K Silverado - 4WD
http://service.gm.com/engif/000/999/999/999999995.gif Subject:Harsh or Delayed 2-1 Downshift, Neutral Feel at a Stop, Shift Busyness, DTCs P0708, P0847, P0872, P0875, P1711, P1713 (Reprogram TCM) #02-07-30-020 - (04/22/2002)
Models:2001-02 Chevrolet and GMC C/K 2500/3500 (3/4 and 1 Ton) Series Pickup Models (Silverado and Sierra)
with Allison® Series 1000 Automatic Transmission (RPO M74)
<A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=880188&pubid=271#ss1-880188">Condition
Some customers may comment on a harsh or delayed 2-1 downshift, a neutral feel at a stop or shift busyness (excessive shifting). Upon investigation, the technician may also find one or more of the following DTCs set:
• P0708
• P0847
• P0872
• P0875
• P1711
• P1713
<A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=880188&pubid=271#ss2-880188">Correction
Reprogram the Transmission Control Module (TCM) with the new service calibrations which were available from Techline starting March 24, 2002 on the TIS2000 version 3.5 or later. These calibrations are electronic calibrations and are NOT available from GMSPO.
These new calibrations will address the following conditions:
2001
2002
Delayed 2-1 downshift at a stop
2-1 downshift quality concerns
Flare & bump on low speed coast-down and throttle reapply
Cold shift quality concerns
2-1 closed throttle neutral feel
*Shift busyness
Harsh 2-1 downshift
DTC P0708, P0847, P0872, P0875, P1711, P1713
Shift busyness
2-1 closed throttle neutral feel
*Important: 2002 Vehicles with 8.1L Engine --
If the concern is shift busyness, the PCM must also be reflashed to gain maximum benefit from the new TCM service calibration. This calibration was available from Techline starting March 10, 2002 on the TIS2000 version 3.0 or later. If the concern is not shift busyness, this step is not required.
This additional step is not required on vehicles with a 6.6L diesel engine (RPO LB7) or 2001 vehicles with an 8.1L engine (RPO L18).
<A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=880188&pubid=271#ss3-880188">Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
Description
Labor Time
K5364
Module, Transmission Control - Reprogram
0.4 hr
J6355
Powertrain Controller -- Reprogram
0.4 hr
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
http://service.gm.com/engif/000/999/999/999999994.gif WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
© Copyright General Motors Corporation. All Rights Reserved.
Does this help????
11-28-2012, 12:50 AM
#13
Gold Member
Gold Member
Yes 4L80E, Good catch, I pulled that info off there internet page.... Guess that won't do him any good!
Sorry for the un usefull information, you had the same code as are work truck, that fixed are truck but not the same transmissions.
Rick
Sorry for the un usefull information, you had the same code as are work truck, that fixed are truck but not the same transmissions.
Rick
11-28-2012, 02:09 AM
#14
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fixx
BTW heres the funny part tho,,the allison shared a GM valve body tho so that may be the reason why the code are the same..
11-28-2012, 05:21 PM
#16
Platinum Member
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iTrader: (1)
If indeed it has a 4l80E I would first unplug trans connecter , check for corrosion, grease it with dielectric grease then replug it in and clear code. If this did not help I would then check for a TCM reflash at the dealer for affected veh vin and see what comes up, if you end up dropping the pan I would check to see if any of the pressure manifold bolts are loose, I have seen them loose before, IF you did find them loose I would drop the pressure manifold and see if the o-ring's that seal each individual switch appear to be hard or flattened too much. I also see alot of 4l80e vbodys with afl valve wear and boost valve bore wear in the pump which will screw with pressures to trans. If it is indeed a Allison I don't have much I can tell you as we rarely ever see them or troubleshoot them, Smitty
11-28-2012, 05:54 PM
#17
Registered
You should use the tow/haul if you are towing heavy loads. It is kind of like having a built in tuner for towing. The computer has a different program setting for stronger shifts on the trans, different shift curves to maximize torgue needed for the pull and other parameters that you will benefit from.
If you don't use the tow/haul button the PCM will figure it out as you go and adapt but it can allow some soft shifts and clutch pack slippage that will accelerate wear in the long haul.
11-28-2012, 05:58 PM
#18
Gold Member
Gold Member
[QUOTE=mrfixxall;3822637]i believe 03 was the first year for the allison/8.1 combo..
BTW heres the funny part tho,,the allison shared a GM valve body tho so that may be the reason why the code are the Same
Yep, that would makes sense, another good catch !!!!
Rick
BTW heres the funny part tho,,the allison shared a GM valve body tho so that may be the reason why the code are the Same
Yep, that would makes sense, another good catch !!!!
Rick
11-28-2012, 08:24 PM
#19
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OP stated it's an Allison, I was under the impression the 8.1 always came with the Allison in the trucks regardless of year, and the 4L85e in the Avalanche/ Suburban only? I know 03 had the Allison with 8.1 in the trucks.
On another note, Yes on Tow/ Haul as needed, more engine braking and way better shifting with a load, holds gears longer, and downshifts more aggressively.
On another note, Yes on Tow/ Haul as needed, more engine braking and way better shifting with a load, holds gears longer, and downshifts more aggressively.
