1991 sedan Deville Cadillac wire color meanings for the fuel pump wires?

Here's a wiring guide for the fuel pump on a 2000 Cadillac Deville: 1. Remove the fuel tank and access the fuel pump module. 2. Disconnect the electrical connector from the top of the fuel pump module. 3. Locate the wiring harness that runs from the fuel pump module to the car's electrical system. 4. Cut the wires on the old fuel pump module connector, leaving enough wire to splice the new connector onto. 5. Connect the black wire from the new fuel pump module connector to the black wire in the car's wiring harness. 6. Connect the purple wire from the new fuel pump module connector to the purple wire in the car's wiring harness. 7. Connect the gray wire from the new fuel pump module connector to the gray wire in the car's wiring harness. 8. Connect the black/white wire from the new fuel pump module connector to the black/white wire in the car's wiring harness. 9. Connect the new fuel pump module electrical connector to the car's wiring harness connector. 10. Reinstall the fuel tank. Note that it is important to follow the wiring guide carefully to ensure proper installation and avoid damaging the fuel pump or electrical system. If you are unsure about any step of the process, it is recommended to seek assistance from a professional mechanic or refer to the vehicle's service manual.

ASK MASTERPRO, THIS .
ONLY THEY KNOW WHAT THEY DID.

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The gray wire is fuel pump battery positive voltage supply , not red wire. Red is not red ,it's pink with a black trace . Power for fuel tank sending unit.
https://www.youtube.com/watch?v=McnXLcJNVfI&t=3s

The gray wire goes from the pump relay to the pump. The black white wire is the ground for the pump. The purple is for the gauge on the dash and the black is ground for the sending unit. I don't list a white wire being used.
If the colors on the truck don't match the tank, you'll have to test them to verify each circuit.

Your vehicle radio color codes below;

Radio 12v blue + radio harness
Radio Ground (chassis)
Radio Ignition pink + radio harness
Radio Illumination yellow/red + radio harness
Factory Amp Turn-on blue/white or pink + radio harness
Power Antenna N/A
LF Speaker +/- purple - green/yellow +,- radio harness or amp under rear deck
RF Speaker +/- brown - brown/white +,- radio harness or amp under rear deck
LR Speaker +/- orange - black/pink +,- radio harness
Notes: On vehicles with premium audio systems, the LR speaker wires are yellow/green - white/orange.
RR Speaker +/- gray - gray/red +,- radio harness
Notes: On vehicles with premium audio systems, the RR speaker wires are red/black - gray/blue.

I think this is the right table, but I don't know if it will display right. If not, go to http://www.installdr.com/InstallDocs/GM/PDF/460005.pdf

Typical GM Factory Typical New Radio
Pin What It Is In Dash Wire Color Equivalent Wire Color
A Left Front Spkr (-) Light Gray White w/ Black Stripe
B Left Front Spkr (+) Tan White
C Right Front Spkr (-) Light Green Gray w/ Black Stripe
D Right Front Spkr (+) Dark Green Gray
E Ground Wire Black Black
F Not Used
G Headlight Dimmer Wire Gray Orange (if available)
H Power Antenna Turn On Pink Blue
I +12 Volt Ignition Wire Yellow Red
J +12 Volt Battery Wire Orange Yellow
K Right Rear Spkr (-) Light Blue Purple w/ Black Stripe
L Right Rear Spkr (+) Dark Blue Purple
M Left Rear Spkr (-) Yellow Green w/ Black Stripe
N Left Rear Spkr (+) Brown Green

from the factory service manual radio diagrams.

1994 Cadillac Deville Sedan Car Radio Wiring Guide

Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger Wire: Pink
Car Audio Front Speakers Size: 4′ x 6′
Car Audio Front Speakers Location: Dash
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: 6′ x 9′
Car Audio Rear Speakers Location: Rear Deck
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

Constant 12V+                 Blue/Yellow  Switched 12V+                             Gray  Ground                                         Brown  Illumination +                                Green  Dimmer n/a  Antenna Trigger                             Black/Red  Antenna Driver's Pillar  Front Speakers                             3 1/2" Dash Left Front (+)                                 Pink  Left Front (-)                                  Purple  Right Front (+)                               Light Green  Right Front (-)                                Blue  Rear Speakers                               5 1/4" Rear Deck Left Rear (+)                                  Black  Left Rear (-)                                   Yellow  Right Rear (+)                                Red  Right Rear (-)                                 White