2001 Yukon ac blow warm at idle but cold at speed

[Dvdtactical]

2001 Yukon 5.3 4x4 SLT with rear air and manual controls.

Pressures are at spec. Replaced compressor, R drier, o tube, lines as needed. At start up it blows COLD 36-40F. Head out it blows cold. Stop at store 25 minutes away and it blows really warm. Pressure on low side runs 45-50. Drive home and it blows cold again. Park and idle it stays blowing cold. Guess the truck doesn't like going to town.

 

[Scottydoggs]

the fans coming on?

 

[Fless]

If the electric fan mod hasn't been done, is the fan clutch working correctly?

Are both halves of the fan shroud in place?

 

[Dvdtactical]

My thoughts were leaning to the clutch but it appears to be working. Spins with some resistance.

 

[Dvdtactical]

the fans coming on?

Clutch fan appears to be working. Never replaced, yet.

 

[Scottydoggs]

Clutch fan appears to be working.ver replaced, yet.

ye ol clutch fan, engine off grab a fin, push and pull rad to engine feeling for play. if its got play its bad, if you can just spin it and turns round and round, its bad.

 

[Fless]

There may also be air baffles on either side of the radiator, behind the grill. Make sure they're in place and in good shape.