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Old 12-10-2020, 07:40 PM   #10
2SS Capt
2020 Shadow Gray 2SS
 
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Drives: 2020 2SS - A10, NPP, MRC, CAI
Join Date: Dec 2019
Location: SoCal
Posts: 3,816
Went to the dealer and had TSB 20-NA-055 (v1.6) completed (reflash of the ECM)... Hopefully this problem will never recur...

Here is the TSB: TSB 20-NA-055 (v1.6 - Sept 2020)

Because when you are going roughly 30 mph your instrument cluster shouldn't look like this (issue happened at start up but I had to get it home (about 4 miles), my daughter took this while I was driving):



Car wouldn't shift, stayed in one "default" gear which I think was 2nd or maybe 3rd, sounded weird, check engine light on and Traction Control light on... Glad to find out it was a known issue and there was a fix for it (the above TSB).
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2020 SGM 2SS - A10, NPP, MRC, Red Calipers, Black Fender Badge, Footwell Lighting
After delivery: - GMP CAI, GMP Black Strut Tower Brace, MRR017 1LE Wheels, SS Armrest, Black Fuel Door, Stainless Pedals, SS Wheel Caps, GM Splash Guards, DD Smoked LED Markers, Smoked Rear Reflectors, Mishimoto Catch Can, Xpel PPF-Full Front & Rockers, 35% Tint, CeramicPro coated, RST Stainless Brake Lines, Castrol SRF, MSD Plug Wires, Mamo V3 Ported TB

Left: My "fun" ride (475 HP). Right: My "work" ride (52,000 HP): a Gulfstream G600. One's top speed is 180 Mph, the other, 620 Mph. BOTH AWESOME to operate...
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