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Old 01-14-2019, 12:11 AM   #6
Under the hood
CarolinaHD's Avatar
Join Date: Aug 2017
Location: Mt. Pleasant, NC
Posts: 131
Re: GMT400 Wiring Woes

Have you verified that both injectors are getting power and spraying fuel? I had a similar issue in my 89 suburban that I just sold. After wasting $200 on injectors and an ignition control module, it was the injector driver in the ecm burned up. Open up the ECM case and look for anything burned. Should be behind the glove box.
1967 C50 292ci
1988 R2500 Suburban 454ci Fitech
2004 Tahoe Z71 5.3
2003 3500 LBZ/ZF6/4x4
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