TSB Descriptions

[dloughrey]

Had my truck in for a cel P2201 with 46000 miles. Replaced NOx sensor bank 1 under Emissions warranty. The one in front under the turbo. It lists for $592.00

Anyway they did a couple of TSB's, 18-054-1884 and 21-001-884. Can anyone tell me what these are?

Thanks!

 

[Bob4x4]

The 18 is a pcm flash and the 21 is a trans