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For only ~$70 it claims to work with OBD2: [ref. as long as the link works, here:] https://www.amazon.com/Eoncore-Universal-Display-Interface-Speeding/dp/B011CIXFTQ?tag=b0c55-20

States it works on ALL post '03 American. However, a chart (going from memory) states a 1996 OBD spec 1850-10.4 will work. Reviews are across the board pro-con. Perhaps not ready for prime time, but interesting product to compare with $3 phone apps, and the Canadian $300 visor mounted product.
 

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ODBII didn't change much in the GM's from 1996 until 2006. Used J1850 VPW protocol at 10k baud.

If the codes are compatible with the codes in the B-Body or any other vehicle running ODBII then sure. And MOST of the pre 2006 GM vehicles likely had the same codes for speed, temp etc.

With CANBUS (2006+) It is federally mandated that certain functions have to be the same across all cars.
 
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