Posted 2011-10-28 11:16 AM (#138578) Subject: Chevy 4500
Member
Posts: 22
Why does the engine brake light come and the bells go off when we drive our 2004 truck within a few miles? We have to stop and turn the truck off and then turn it back on. The truck will be fine untill we stop for awhile like at a show... Then we just get started down the road and the dumb truck does it again!! Some places it's kinda hard to stop say like in large cities..
Posted 2011-10-29 1:17 AM (#138596 - in reply to #138578) Subject: RE: Chevy 4500
Expert
Posts: 3853 Location: Vermont
Originally written by horsejunkie on 2011-10-28 11:16 AM
Why does the engine brake light come and the bells go off when we drive our 2004 truck within a few miles? We have to stop and turn the truck off and then turn it back on. The truck will be fine untill we stop for awhile like at a show... Then we just get started down the road and the dumb truck does it again!! Some places it's kinda hard to stop say like in large cities..
Models: 2003-2005 Chevrolet Kodiak C4500-C5500 Series
2003-2005 GMC TopKick C4500-C5500 Series
with 6.6L Duramax® Diesel Engine (VINs 1, 2 -- RPOs LB7, LLY) and Exhaust Engine Brake (RPO K40) and/or Exhaust Restrictor Equipment (RPO NPE)
Some customers may comment on low engine power/performance or an MIL/SES light on. Any of the following conditions may also be noted:
• Poor Acceleration
• DTC P0101- Mass Air Flow (MAF) Sensor Performance
• DTC P0236-Boost Pressure Sensor Signal is below predicted range
• Exhaust Brake always on
• Excessive exhaust smoke
• Exhaust hissing noise
• Exhaust Brake inoperative
The engine exhaust brake valve shaft may corrode, causing the valve to stick open or close.
Install an updated engine exhaust brake valve. Refer to Engine Brake Replacement in SI.
Part Number
Description
Engine
RPO
15287855
Valve, Exhaust Brake
LLY
K40
15287856
Valve, Exhaust Brake
LB7
K40/NPE
15051538*
Gasket, Exhaust
*P/N used on LLY and LB7 applications. Quantity of 2 gaskets needed for repair.
Chevy 4500
