Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2004 GMC Jimmy (CANADA) V6-4.3LFACTORY OEM SERVICE PROCEDURE
System Specifications
Cylinder Head Bolt - Preferred Method
All Bolts First Pass in Sequence 30 Nm (22 ft. lbs.)
Long Bolt Final Pass in Sequence 75 degrees
Medium Bolt Final Pass in Sequence 65 degrees
Short Bolt Final Pass in Sequence 55 degrees
Cylinder Head Bolt - Optional On-Vehicle Strategy
First Pass in Sequence 35 Nm (26 ft. lbs.)
Second Pass in Sequence 60 Nm (44 ft. lbs.)
Final Pass in Sequence 90 Nm (66 ft. lbs.)
Exhaust Manifold Bolt/Stud
First Pass 15 Nm (11 ft. lbs.)
Final Pass 30 Nm (22 ft. lbs.)
Lower Intake Manifold Bolt
First Pass in Sequence 3 Nm (27 inch lbs.)
Second Pass in Sequence 12 Nm (106 inch lbs.)
Final Pass in Sequence 15 Nm (11 ft. lbs.)
Upper Intake Manifold Stud
First Pass 5 Nm (44 inch lbs.)
Final Pass 9 Nm (80 inch lbs.)
Cylinder Head Deck Surface Flatness 0.050 - 0.152 mm (0.002 - 0.006 inch)
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.