Chevy Colorado & GMC Canyon - View Single Post - Issue: Engine Misfire, P0300 - TSB #04-06-04-081A
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Old 01-10-2005, 04:00 AM Thread Starter
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Issue: Engine Misfire, P0300 - TSB #04-06-04-081A

Document ID# 1564496
2004 Chevrolet Colorado Pickup


Engine Misfire, P0300 (Replace Exhaust Valve Springs and Seals) #04-06-04-081A - (Nov 12, 2004)

2004-2005 GMC Canyon

with 3.5L Inline 5 Cylinder Engine (VIN 6 - RPO L52)

This bulletin is being revised to correct the part quantities and a part number. Please discard Corporate Bulletin Number 04-06-04-081 (Section 06 -- Engine).

Some customers may comment on the Check Engine Light flashing. Additionally, some customers may comment on a light engine knocking or mis-fire noise during warm up or on a decel after the engine is fully warmed. Upon investigation, the technician will find a misfire code P0300 through P0305.

Perform the diagnosis for the P0300 code as found in the appropriate section of Service Information. If no concern is isolated through the diagnosis, then replace all of the exhaust valve springs and seals. Refer to the Valve Stem Oil Seal and Valve Spring Replacement section of the Service Information for the proper procedure.

Parts Information - Part Number - Description - Qty

12596078 - Spring, Exhaust Valve - 10

12596501 - Seal, Exhaust Valve Stem - 10

24100165 - Gasket, Throttle Body - 1

12565425 - Bolt, Camshaft - 1

24100263 - Bolt, Camshaft Position Actuator - 1

12586690 - Gasket Kit, Intake Manifold - 1

Parts are currently available from GMSPO.

Warranty Information
For vehicles repaired under warranty, use:

Labor Operation - Description - Labor Time

J0548 - Spring, Cap And/Or Seal, Valve - All - Replace - 6.1 hrs

Ken Deatrick
2004 COLORADO 4WD LS EXT CAB Z85 - CT15653
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