GM Service Manual Online
For 1990-2009 cars only

The services shown in this schedule up to 162 500 km (97,500 miles) should be performed after 162 500 km (97,500 miles) at the same intervals.

Every 12 500 km (7,500 Miles)

    • Inspect the CNG fuel lines and the fittings for leaks.
    • Inspect the CNG fuel vapor hoses and clamps for leaks.
    • Inspect the fill valve O-ring.

Every 100 000 km (60,000 Miles)

    • Replace the spark plugs.
    • Replace the high pressure regulator (HPR) filter.