My 54/55 GMC COE dash looks like vwlfan's, including the knobs.
The choke cable on my COE does not have the original knob. None of the available choke cables (with correct knob) on the market were long enough in length to be used for a COE application. I did buy the correct choke knob but I have not yet attempted to remove the third party knob and update it with the correct knob.
One question - why are your gauge panels black?
The gauge panels in my COE are the original panels and are unrestored. So at least the non-deluxe trucks had black gauge panels. I bought an extra set of 54/55 gauge panels for a spare and they are black also: 1954/1955 GMC Spare Gauge Panels
That's one of the best-preserved interiors I've ever seen.
You might enjoy some of these photos which are from my 53 GMC Fire Truck. The interior is one of the cleanest original and unrestored interiors I have seen. 1953 GMC Unrestored Interior
This is a photo of the area under the gas tank at the time I removed the tank. I know this area looks repainted but this is the original non-faded paint. 1953 GMC Paint Under Gas Tank
Interesting. Your headlight knobs looks like the correct style, but it's black instead of ivory. My panel had the ivory knob, but UV radiation completely destroyed it. The wiper knob is also different from Chevy, but it also rarely survives in the sun. IMHO, the Chevy headlight and wiper knobs look better, just paint them to match. Same with the throttle and choke knobs. The parking brake, window crank, turn signal, radio and heater knobs are all the same as Chevy, but in ivory instead of black.
With the two-tone seats, I'm pretty sure your truck has the DeLuxe interior. Does it have the driver-side armrest and passenger-side interior visor?
I've just looked up some pics of my COE, it has the black gauge panels, too. My 1-ton panel, which also has the two-tone brown interior, has dark brown gauge panels. WTF? That makes absolutely no sense.