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'09 Suburban 5.3 'LC9' flex random engine knock
Posted to Technical Discussion Forum on 10/7/2017 19 Replies

has 198K on it now...at 90K i installed a Jasper rebuilt engine...it has run flawless up to now...almost always at idle,in gear,it will occasionally have an engine knock (slight hesitation at same time) but not consistent in any way....but sounds exactly like ... Login to read more.

19 Replies Received (View Replies)