Thermostat on 1999 chevy express 3500 5.7litres

SOURCE: 1999 Chevy express 454 belt diagram.

454 with ac and a.i.r.

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Thomas Perkins

• 15088 Answers
• Posted on Jul 24, 2012

SOURCE: chevy express 1999 didn't start, i have a code p1336. i've change the crank shaft sensor but it didn't strat and i have a P1336 code again

Trouble Code: P1336

CKP Sensor System Variation Not Learned
Possible Causes:


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.