Question about 1999 GMC Suburban
My 1999 suburvan fuel pedal starts vibrating when the vehicle starts accelerating until the vehicle reaches 55 mph. I rotated and balanced all tires and will align the tires soon. The vibration persist
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Posted on Jan 02, 2017
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Dec 09, 2013 | Ford Cars & Trucks
Jan 30, 2013 | Cars & Trucks
Trouble Code: P1336
CKP Sensor System Variation Not Learned
Set the parking brake and block the drive wheels for safety. Verify the hood is closed. Read the trouble codes. If a code is set, refer to that code. Start the engine. Allow engine temperature to reach at least 158?F (70?C). Then key off. Select Crankshaft Position Variation Learn procedure on Scan Tool & start the vehicle. Apply the brake pedal firmly and verify the selector is in Park. Increase accelerator pedal position until fuel cutoff is reached at the test rpm (e.g., 5150). Quickly release the accelerator pedal after fuel cutoff is reached. The CKP system variation compensating values are learned when the engine speed (rpm) decreases back to idle speed and the procedure terminates. Read the trouble codes and recheck for DTC P1336. If DTC P1336 runs and passes, the CKP system variation "learn" procedure is complete. If not, look for other codes. If no codes are set, repeat the test procedure.
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