00 4.6L Deville, Seville, Eldorado Replacement Service Engines Require a PCM Reprogram - kw LD8 L37 rough idle

The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.

2000 Deville/ Seville/ Eldorado service engines P/N 88894249 (LD8) and 88894250 (L37) have superceded to part number 88894240 (LD8) and 88894239 (L37). These service engines have the updated camshaft profile for improved idle charactistics that went into production in the 2001 model year.

When service engine p/n 88894240 and 88894239 has been installed in a 2000 model vehicle, the PCM calibration must be updated match the improved camshafts. To update the calibration contact TECHLINE and inform TECHLINE that this engine has been installed in this 2000 vehicle. Techline will give the dealer a Vehicle Configuration Index (VCI) number to install the correct calibration.

Techline must be contacted each time so they have a record of when an engine installation with the updated camshafts has occurred on each vehicle. This will ensure that any future calibrations for that vehicle will be correct. Service engine part numbers 88894240 & 88894239 will now come with an instruction sheet containing the information to contact Techline for a calibration when this engine is installed in a 2000 Vehicle. When using these engines in 2001 and 2002 model years, a calibration update is not necessary.

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Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.

(00 Cadillac Deville, Seville Eldorado with 4.6L LD8, L37)

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