I have a 2000. Gmc Tahoe this my third time replacing the knock sensors can some body tell me why it's doing that

10

Asked by Maria Aug 30, 2014 at 04:35 AM about the 2000 GMC Yukon SLT 4WD

Question type: Maintenance & Repair

2 Answers

1,830

IT'S NOT the knock sensors, they should last 80,000 miles easy, if it was the same shop every time they are ripping you off. a trouble code is not the problem, its where you start diagnosing. Lot of miles? if the engine is getting noisey the knock sensors will (hear) ticking / rattling, same way they hear preignition (spark knock), and tell the PCM to retard the timing = poor mileage

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