Suburban 1/2 Ton 2WD V8-5.3L VIN T (2004)
Important:
The intake plenum should also be checked for excessive warpage that may cause an uneven clamping pressure of the seal. If the plenum is found to
be warped it will need to be replaced. Service Information states, "An intake manifold with warpage in excess of 3 mm (0.118 in) over a 200 mm
(7.87 in) area should be replaced." Intake warpage is measured at the gasket sealing surfaces and should be measured within a 200 mm (7.87 in) area.
This measurement is across only two of the intake runner port openings. Measurements taken across the entire distance of all four intake runner ports
will lead to unnecessary manifold replacements.
Important:
Measurements taken across the entire distance of all four intake runner ports will lead to unnecessary intake manifold replacements.
1.
Locate a straight edge across the intake manifold cylinder head deck surface. Position the straight edge across two runner port openings.
2.
Insert a feeler gauge between the intake manifold and the straight edge. An intake manifold with warpage in excess of 3 mm (0.118 in) over a 200
mm (7.87 in) area is warped and should be replaced. Do not replace intake manifolds with warpage that measures less than 3 mm (0.118 in) over a
200 mm (7.87 in).
Parts Information
Warranty Information
For vehicles repaired under warranty, use the table.
