GAME GENIE CODES: Abrams Battle Tank.
 No.  Code  Effect

NOTE: Many readouts may look strange when the amount is 100 or more.
You can often get the correct reading from the Commanding Officer's Check Damage screen
   1  AMFA-AA22  Infinite ammo
   2  AMEA-AA66  Infinite machine gun rounds
   3  AJJA-CA6R  Infinite smoke canisters
   4  CDMT-AA30  Infinite fuel
   5  AJHT-CA9J  Infinite smoke
   6  BJJA-CAEY  10 seconds of smoke per canister
   7  CTJA-CAEY  20 seconds of smoke per canister
   8  FYJA-CAEY  45 seconds of smoke per canister
   9  HTJA-CAEY  60 seconds of smoke per canister
 10  SAJA-CAEY  120 seconds of smoke per canister
 11  FTJA-CCEY  300 seconds of smoke per canister
 12  SDMT-BLV0  Fuel is consumed 2x as fast
 13  SDMT-BWV0  Fuel is consumed 4x as fast
 14  BLFT-AAF6  Start with 10 gallons of fuel
 15  DGFT-AAF6  Start with 25 gallons of fuel
 16  GLFT-AAF6  Start with 50 gallons of fuel
 17  W4FT-AAF6  Start with 150 gallons of fuel
 18  3CFT-AAF6  Start with 200 gallons of fuel
 19  8WFT-ACF6  Start with 500 gallons of fuel
 20  HWGT-AABJ + HWGT-AACE  Start with 60 rounds of total ammo
 21  LCGT-AABJ + LCGT-AACE  Start with 80 rounds of total ammo
 22  NWGT-AABJ + NWGT-AACE  Start with 100 rounds of total ammo
 23  3CGT-AABJ + 3CGT-AACE  Start with 200 rounds of total ammo

With Codes 24 thru 50, the numbers of each kind of ammo may not be adjustable from the
Supply Depot screen.
 24  ACFT-AAF0  Start with 0 smoke canisters
 25  ARFT-AAF0  Start with 3 smoke canisters
 26  BLFT-AAF0  Start with 10 smoke canisters
 27  CWFT-AAF0  Start with 20 smoke canisters
 28  GLFT-AAF0  Start with 50 smoke canisters
 29  NWFT-AAF0  Start with 100 smoke canisters
 30  ACFT-AAFT  Start with 0 machine gun rounds
 31  CWFT-AAFT  Start with 20 machine gun rounds
 32  GLFT-AAFT  Start with 50 machine gun rounds
 33  NWFT-AAFT  Start with 100 machine gun rounds
 34  W4FT-AAFT  Start with 150 machine gun rounds
 35  9LFT-AAFT  Start with 250 machine gun rounds
 36  8WFT-ACFT  Start with 500 machine gun rounds
 37  FCFT-AAE8  Start with 40 HEAT rounds
 38  HWFT-AAE8  Start with 60 HEAT rounds
 39  LCFT-AAE8  Start with 80 HEAT rounds
 40  NWFT-AAE8  Start with 100 HEAT rounds
 41  CWFT-AAFE  Start with 20 Sabot rounds
 42  FCFT-AAFE  Start with 40 Sabot rounds
 43  HWFT-AAFE  Start with 60 Sabot rounds
 44  LCFT-AAFE  Start with 80 Sabot rounds
 45  NWFT-AAFE  Start with 100 Sabot rounds
 46  CWFT-AAFL  Start with 20 AX rounds
 47  FCFT-AAFL  Start with 40 AX rounds
 48  HWFT-AAFL  Start with 60 AX rounds
 49  LCFT-AAFL  Start with 80 AX rounds
 50  NWFT-AAFL  Start with 100 AX rounds

Codes 51 and 52 won't prevent your tank from being destroyed if it takes enough hits.
They don't prevent engine damage from overheating, either.
 51  RHNA-A6ZC  Equipment can't be damaged
 52  AHNA-BZ7C  Equipment can't be destroyed

Download The Big Book of Game Genie Codes.