Engine - No Cold Start When Glow Plug Wait Lamp is OFF
89Chevy27GMC NUMBER: 89-6D-105
GROUP: 6D ENGINE ELECTRICAL
DATE: OCTOBER, 1989
CORPORATE
NUMBER: 936519R
SUBJECT: NO COLD START CAPABILITY WHEN GLOW PLUG WAIT LAMP IS NOT OBSERVED (NEW CONTROLLER)
MODELS: 1985-89 C/K R/V G AND P MODELS WITH 6.2L DIESEL ENGINES (VIN CODES J, C)
Some 1985-89 C, K, R, V, G and P-trucks with a 6.2L diesel engine may experience a "no start" condition when cold. The electronic glow plug controller, P/N 12052153 (color coded black), may be responsible for a no start condition. If a no start condition exists, refer to the diagnostic procedure listed in GMC bulletin 88-T-39 (corporate number 866001). Should an electronic glow plug controller be required, based on your diagnostics, the following controller should be used. The new controller, P/N 12088520 (color coded grey), is being released with improved circuit board components to address no start difficulty. Part is currently available from GMSPO. Use applicable labor operation number and time.