What is the proper fluids, and capacities of the transfer case in the middle of the truck, and the 4x4 transfer case at the front of the truck on a 2001 cherolet sliverado 2500HD Diesel?

The warm garage check is not a bad idea, all in all if it still doesnt work you have a bad front axel 4X4 solenoid (POSSIBLY). Also check your differential fluid and your transfer case fluid. Old dirty fluid will cause the four wheel drive to be sticky and not engage properly. If the fluid is dark at all, change it ASAP. Good luck.

1999 Blazer. Thing's to check. 4x4 problem. There's an actuator pump under your battery plate. Make sure its in good shape and its working proper. Next check the cable that runs from the pump to the front transfer case. Then check the actuator switch on the front transfer case. Then check the vacuum lines from the front transfer case to the rear transfer case, that should be right under the drivers side door. There's also a actuator switch on the rear transfer case witch two vacuum lines run out of. Check them also, and last check your fluid level in your transfer case. Start from the beginning to the end. Don't forget to use your 4x4 every know and then to keep it up to power. Its not like the good old days. Where a pull of the lever on the floor engaged the 4x4. I hope this helps.

FRONT AXLE ± 0.3 L (2 oz.)
C200F
1.7L (57.5 Ounces)
C200FE
1.7L (57.5 Ounces)***
REAR AXLE ± 0.3 L (2 oz.)
C213R
2.07L (70 Ounces)
C213RE
2.24L (75.5 Ounces)***
*Nominal refill capacities are shown. A variation may be observed from vehicle to vehicle due to manufacturing tolerance and refill procedure.
** Includes 0.9L (1.0 Quarts) for coolant reservoir.
***ELSD - add 118 ml (4 Ounces) of friction modifier.
Transfer Case (3.7L Engine)
Mopar® ATF+4 Automatic Transmission Fluid
Transfer Case (3.0/4.7/5.7L Engines)
Mopar® NV 247/245 Transfer Case Lubricant
Transfer Case (6.1L Engine)
Mopar® NV146 Transfer Case Fluid. Usage of other fluid/lubricants is NOT recommended.
Axle Differential (Front-Rear)
Mopar® Synthetic Gear & Axle Lubricant SAE 75W-140 (API-GL5) or equivalent with friction modifier additive.

2000 TOYOTA TACOMA 2.7L 4-cyl Engine Code 3RZ-FE

Engine Oil Grade 1......API* All TEMPS......5W-30 Optional ..10W-30
Engine, 2WD, with filter..........5.5 liters
Engine, 4WD, with filter..........5.4 liters

Manual Transmission,......GL-5/ GL-4 All TEMPS......75W-90
Automatic Transmission,A340E......AF3 / A43D......AF3

Differential, Front/ Rear W/ ADRD......GL-5 ALL TEMPS......75W-90
Differential, Front Less ADRD......GL-5 ALL TEMPS......80W-90

Transfer Case,......GL-4/GL-5 ALL TEMPS......75W-90 Gear oil.

Capacity:
Cooling System, Initial Fill..........8.5 liters
Automatic Transmission, A340E Initial Fill..........1.6 liters
Automatic Transmission, A340F Initial Fill..........2 liters
Automatic Transmission, A43D Initial Fill..........2.4 liters
Automatic Transmission, Total Fill
4 speed A340E..........7.2 liters
4 speed A340F..........10.1 liters
4 speed A43D..........6.5 liters
Manual Transmission, ..........2.5 liters
Differential, With ADRD Front..........1.2 liters
Differential, Without ADRD Front..........1.1 liters
Differential, 2WD V6 Rear..........2.6 liters
Differential, 4WD Extra Long Rear..........2.5 liters
Differential, Short WB With LSD Rear..........2.7 liters
Differential, Short WB Without LS Rear..........2.6 liters
Transfer Case, Electronic..........1.2 liters
Transfer Case, STD..........1 liters

Hi

It could just be low fluid in the gearbox/transfer box have you checked these?

Is the car new to you?

check fluid level in transfer case and front axle

The kind of fluid needed is called GLS this is not something you can get at some grease and go. To my knowledge this particular fluid is still a dealer only item. DO NOT put ATF in your transfer case. I don't remember the capacity but the dealership would have this information.

4x4 actuator may be bad. its has an elctrical switch. this is the part that pushes your front drive shaft forword to engage the front diff. it also may not be aligned properly. You should also check your transfer case fluid level and the front diffs fluid.

Changing the Fluid would help But, It will not solve the Problem. It sounds like you may have a Broken tooth on a Gear inside the Transfer Case. The only real way to fix this is to Take the Transfer Case off and check the Gears and Electronics. Maybe even get it Overhauled.

CHANGED FLUID IN TRANSFER CASE AND FRONT DIFFERENTAIL!!!! Don't burn it up, Add syncromesh fluid to each unless atf is used