SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 96 (ENGINE CONTROLS - SERVICE & ADJUSTMENT SPECIFICATIONS)MECHANICAL CHECKSENGINE COMPRESSION
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Engine Compression

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Engine Compression
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2002 Saturn Vue, 2002 Pontiac Montana, 2002 Pontiac Aztek, 2002 Oldsmobile Silhouette, and 2002 Oldsmobile Bravada. However, it is still accessible from the selected car via links, so may be relevant.
ENGINE COMPRESSION SPECIFICATIONS

Application Specification - psi (kPa)
Normal Compression Pressure
2.0L 199 (1372.1)
2.2L
Sonoma & S10 Pickup (1)
VUE 185-225 (1275.6-1551.4)
2.5L 199-227 (1372.1-1565.2)
3.0L 180-190 (1241.1-1310.1)
4.2L 215 (1482.4)
4.3L (2)
4.8L, 5.3L & 6.0L
Except Sierra & Silverado (1)
Sierra & Silverado (2)
5.0L & 5.7L (2)
6.5L (2)
6.6L (2)
All Others (1)
Minimum Compression Pressure
2.0L 170 (1172.2)
2.2L
Sonoma & S10 Pickup (1)
VUE 185 (1275.6)
2.5L 185 (1275.6)
3.0L 100 (689.5)
4.2L (3)
4.3L (2)
4.8L, 5.3L & 6.0L
Except Sierra & Silverado (1)
Sierra & Silverado (2)
5.0L & 5.7L (2)
6.5L (4) 370 (2551.2)
6.6L 300 (2068.5)
All Others (1)
Compression Variance
2.0L & 2.5L 15 (103.4)
6.6L 50 (344.8)
All Others (2)
(1) Lowest compression reading should not be less than 70 percent of highest compression reading. No cylinder compression reading should be less than 100 psi (689.5 kPa).
(2) Information is not available from manufacturer.
(3) Lowest compression reading should not be less than 70 percent of highest compression reading.
(4) Subtract 8 psi (55.2 kPa) for every 1000 ft. (304.8 M) of elevation above seal level. Measurement is taken with cold engine speed of at least 100 RPM, or hot engine speed of at least 180 RPM.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.