GM Service Manual Online
For 1990-2009 cars only

Exhaust System SOHC (L24)/DOHC (LL0)

Measurement

Standard

Service Limit

Metric

English

Metric

English

Exhaust Back Pressure

At 4,000 RPM (No Load)

Coolant Temperature 90°C (195°F)

5 kPa

1.5 in Hg max

Note: Wide open throttle checks are performed at 24 km/h (15 mph) in D for auto transaxles and 3rd gear for manual transaxles.

Wide Open Throttle Check

50 kPa

7.25 psi max