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murph 05-03-2006, 10:14 PM Got the truck started a little while ago - dead batteries. Took more than a couple of seconds of crankning to finally start, and now the SES light is on. As part of the troubleshooting, i pulled the fuses under the hood. would that cause the light to come on, or is it a result of the dead batteries? Andy gmctd 05-03-2006, 10:16 PM Sounds like it's in Backup mode - can you get a scan on it? murph 05-04-2006, 08:47 AM backup mode? it cranked fine this morning, but didn't start right away - white smoke until it finally caught. Sounds to me like the GPs didn't heat up. i'm heading out in a little bit to put a scanner on it. Andy quantum mechanic 05-04-2006, 08:55 AM Glows might be dead, test them, good ones have .08-1.4 ohms murph 05-04-2006, 12:18 PM backup mode? it cranked fine this morning, but didn't start right away - white smoke until it finally caught. Sounds to me like the GPs didn't heat up. i'm heading out in a little bit to put a scanner on it. Andy OK, I'm a dumba$$...I replaced the cable going from the DS battery to the underhood fusebox (with #4 welding cable) and forgot to reconnect the wire for the GP relay. Moron...:D Andy | ||