gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

Compression Check|Specifications|Page 2266 > < Spark Plug|Specifications|Page 2262
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Compression Check: Specifications

Record the compression readings from all of the cylinders. A normal reading should be approximately ...............................................  1482 kPa (215 psi).
The lowest reading should not be less than 70 percent of the highest reading.

Compression Check|Specifications|Page 2266 > < Spark Plug|Specifications|Page 2262