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so i changed both front hub assemblys on my 08 tbss due to stabilatrack light... after it was said and done i pulled out of the garage and went to accelerate.... when i did accelerate the abs system applied the brakes and could hear the abs pump working, let off the gas and it went away ... again tried to step on gas pedal and again truck slowed and abs started again .... im damn stumped
 

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08 TrailblazerSS AWD
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I had a bad hub straight out of the box. Speed sensor was not reading correctly and the truck went into limp mode as soon as you tried to apply gas past 1/4 throttle. Might need to hook up to hptuners or some obd2 reader that can monitor abs and the seed sensors to see if they are reading in spec.
 

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2008 Trailblazer SS
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Not sure what brand hubs you installed? I found that either OE Delco units or SKF are usually better than other aftermarket hub assemblies.
 
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