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TrailBlazer2002-2009
2023-
The TrailBlazer, originally introduced as an upscale Blazer, was produced from 2002 to 2008 with a powerful I6 engine and with a monster V8 offered in the Trailblazer SS
Platform: GMT 305, 360, & 370.
check that the 2 locking tabs on the headlight assembly are actually locking
then check to see that the bulbs were inserted correctly into its housing when you twisted them on to the headlamp module.