Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
The OBD-II computer takes a snap shot of the most relevant engine parameters at the same it sets a particular code. Knowing that, I need to ask you some questions in order to get an idea of how to best help you solve this issue:
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hi, can you provide me your VIN nr
you have to check wiring between glow plug control module and glow plugs, sometimes terminal by the glow plug is rusted and needs to be replaced, easiest way to check it is disconnect GPCMand use a test light connected to battery positive terminal and touch all terminals in the plug, if glow plug is good, test light will illuminate, it has to be regular test light !!, test light will illuminate on 9 terminals 8 glowplugs and gpcm ground !
best way to check temperature reading is with the scan tool after it sits overnight, all temperatures should b very close or even . so intake air, coolant temp, egr, egt sensors, transmission oil, engine oil, you will know right away if sensor is bad or with one is causing problems , also as for glow plugs it will delay glow plugs but will never set circuitd codes for individual glow plugs