Under the hood in the fuse box, in spot number 14.
A link has been added that shows the location of this relay.
what is the firing order for a 1999 Chevrolet venture
where is the fuel pump relay on a 1999 Chevrolet Tahoe
No there is not. It is controlled by a relay that receives it's ground from the engine control module.
75 or 75dt
There may be an issue with the relay switch going to the radio lights. There may also be an issue with the fuse.
In the gas tank
Should be at the rear lower section of engine
134A
The 1999 Cadillac Deville headlight relay switch can be found in the fuse box. The headlight relay switch will be in the third column, second from the top.
On your 1999 Chevrolet Venture, the Flasher is located: Below the instrument panel, left of the steering column.
Your back light switch is stuck or out of adjustment. In most cases it will be located some where along the shifting linkage.
R134a freon.............