Hi y'all my name is Voni - I currently own an 86 S10 Blazer, a 94 diesel suburban, and a 04 Avalanche.

my Avalanche's check engine light started flashing - changed the plugs and wires, did a head job.
its still flashing around 30mph or higher. Any ideas, I can't just take it to the shop an have the codes read it takes about 3 weeks to get your vehicle seen out here.