1997 GMC Sonoma Owner's Manual - Page 249
1997 GMC Sonoma Manual
Page 249 highlights
The oil dipstick the on 2.2L engine isunder the fill cap. Checking Engine Oil Pull out the dipstick clean itwith a paper towel or and cloth, then push it back in all the way. Remove it again, keeping the tipdown, and check the level. Turn off the engine and give the oil a few minutes to drain back into the oil pan. you don't, the oil dipstick If might not show the actual level. 6-11
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