Help, 4.8 taking too long to warm up

[gregory5000]

I have a 2001 GMC with the 4.8 engine. A few weeks ago I had a wreak and the front was messed up to the point the condensor coil and the radiator had to be replaced. When I got the truck back I now have a problem. It takes about 19 miles at 60 mph for the truck to get up to temp, that is alittle lower than the 210 mark on the guage. I had no problem like this before the wreak and after the wreak it was still driveable, just bent the brackets and such. I have repalced the thermostat and checked the fan clutch and all is ok. When it warming up it goes up to the first large mark on the guage and then stays there for the longest time then takes about 2 more miles to get to the normal operating temp. Any suggestions would be healpful, I am pulling out what hair I got left.