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Gary
Gary, ASE Certified Technician
Category: GMC
Satisfied Customers: 16513
Experience:  GCM master tech over 25 years
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Im having alot of smoke out of the exhaust used to be just a

Customer Question

im having alot of white smoke out of the exhaust used to be just a lil bit now i look like a train until i hit 3rd or 4th gear and im losing coolant. your opinion????
Submitted: 1 year ago.
Category: GMC
Expert:  Gary replied 1 year ago.

from the sounds of this coolant is getting into a cylinder causing the smoke and the coolant loss

these are common for injector sleeves needing to be resealed or head gaskets

has a coolant pressure test been done yet ?

if yuo have any questions please ask as i do not get credit for my work until you rate us here at Justanswer

this is the bulletin on this issue for this engine

Bulletin No.: 03-06-02-005B

Date: November 18, 2004

TECHNICAL

Subject:
Engine Coolant Loss with No Visible Leaks (Reseal Injector Sleeve)

Models:
2001-2004 Chevrolet Silverado
2001-2004 GMC Sierra
2003-2004 Chevrolet and GMC C4500/5500 Models

with 6.6L Diesel Engine (VIN1 - RPO LB7)

Supercede:

This bulletin is being revised to add technician cautions. Please discard Corporate Bulletin Number 03-06-02-005A (Section 06-Engine).

Condition

Some owners may comment on engine coolant loss with no visible leaks. Excessive white smoke or a coolant type odor coming from the exhaust pipe , along with low coolant levels, may indicate coolant in the combustion chamber.

Cause

Condition may be caused by engine coolant entering the cylinder due to a dirty or damaged seal between the fuel injector sleeve and the cylinder head.

Expert:  Gary replied 1 year ago.

if you have any questions please ask as i do not get credit for my work until you rate us here at Justanswer