Leaderboard

Might find this useful.

My 26 TurboMax. Love it.

For my '12 3500, pulling out the fan and resistor pack, you can get a partial direct view of one side of the evaporator, and if the uv dye shows up using a camera, you could see that whole side of the evaporator. And you can cut a hole in the hvac housing to look at the other side (for my '12, GM has you cut a hole to replace the a/c evap temp sensor that is inserted in the evaporator core, then you glue in a plug to seal it up again).

EDIT: Linking an earlier version of the recall here that's from this very thread: https://www.gm-trucks.com/forums/applications/core/interface/file/attachment.php?id=182274&key=25bd8ff5fd2a227a83b28b5554b53c6d They aren't using the Picoscope test to analyze for P0016 nor is it to analyze cam/crank correlation. If one of these recalled 6.2s comes in with P0016 set, it gets an engine, full stop. This test is done with a special tool they sent to dealers. The tool is a harness with a knock sensor on it. The knock sensor gets installed to an open M8 threaded boss on the left side of the block, and the Pico side of the harness gets attached to Channel B on the Pico. Dealers do NOT use the Pico branded software for this test; they use the GM NVH software for this (both software are installed on shop computers, the GM NVH and the Pico one). The GM NVH software then gets set up to use the supplied sensor/harness as a microphone and then a 30 second or more clip gets recorded. That clip then gets analyzed by a special test that is in GM SPS2 (service programming) and will pass or fail the data. So far engines that I've seen pass pull in the realm of 50-65dB sound range at the 2000rpm the data is recorded at.

Yes. Our sister store got its first test fail.