Transmission Valve Body Part Unique Number

The 10L80 and 10L90 10-speed automatic transmissions (RPO MHS, MHW, MF6, MGL, MQB) available on 2017-2019 Camaro, 2018-2019 Escalade, Tahoe, Yukon Denali, 2019 CT6, Silverado 1500, Sierra 1500, and Suburban models feature a Part Unique Number that may contain the number zero (Fig. 28, #1) and/or the letter O. (Fig. 28, #2)


Fig. 28


If the transmission valve body is replaced, the software may not accept the Part Unique Number (PUN) during the characterization procedure if the PUN is incorrect. Keep in mind that the PUN may contain the letter O as well as the number 0 (zero).

The PUN must be entered correctly during programming. Be sure to enter the PUN accurately and to take notice of the difference between the letter O and the number zero.


– Thanks to Terry Neuendorf

Broken Spark Plug Center Isolator
All-New 2020 Cadillac XT6 Joins Luxury SUV Market

Leave a Reply

Your email address will not be published.