2006-12-05 06:48:03 · 5 answers · asked by Scott L 1 in Cars & Transportation ➔ Car Makes ➔ GMC
Knocking can be several things. You can make a few changes to see if the knocking is affected.
Oil: Have you had the oil changed regularly? If not, now is a good time.
Water: Knocking can be caused by low coolant. Replace with a good coolant or mixture.
Gas. Knocking is also caused by low grade fuel, burning incorrectly in the engine block. This can also cause backfiring and sluggish response. Change to a higher grade for a tank or two to see if there is a difference.
2006-12-05 06:58:20 · answer #1 · answered by Marvinator 7 · 0⤊ 0⤋
Could be your fuel, you have have a low octane fuel. Try filling up with the highest octane fuel and see if you still have the same problem.
2006-12-05 09:39:02 · answer #2 · answered by daango26 2 · 0⤊ 0⤋
You either need to rebulit the engine or replace it.
2006-12-05 06:50:08 · answer #3 · answered by hookeduprides 2 · 0⤊ 0⤋
low octane?
Try winding the key in the back more next time. ;-)
2006-12-05 06:56:31 · answer #4 · answered by ramman 4 · 0⤊ 0⤋
more likely low on oil :(
2006-12-05 06:53:19 · answer #5 · answered by FordMan 3 · 0⤊ 0⤋