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Difference – 1947-55 GMC Grilles

Thursday, February 11th, 2010

During the Advance Design years, 1947-55, Chevrolet and GMC each changed their grille designs twice. GMC made the change at the end of the second year and Chevrolet made the change at the end of the seventh year.

Possibly to save tooling cost GMC, not Chevrolet, always used the same grille on all truck sizes in any one year. As Chevy used a similar but slightly larger grill on their 1 1/2 and 2 ton. GMC did not change the size on trucks between 1/2 and 2 tons.

In 1947-48 GMC used a three bar heavy gauge chrome steel grille. Actually, it was for the heavy weight for the 2 tons but fit in the 1/2 ton by using a smaller grill surround.

The big grille change for GMC was in 1949 when it was made as a four bar design. To the non truck enthusiast, it looked somewhat like the earlier years which is probably what GMC designers planned.

Current GMC grille reproductions are often sold as 1947=55. Actually they are the four bar type for 1949-55. The 1947-48 GMC owners get a surprise due to the modifications needed to fit the later reproduction grille into their early housing!

Click on images below to enlarge

1947-1948 Three Bar Grille 1947-1948 Three Bar Grille C.O.E Four Bar Grille
Three to Five Ton Four Bar Grille
Half Ton to One Ton Four Bar Grille
Half Ton to One Ton Four Bar Grille

1947-1953 Chevrolet Grille Restoration Tips

Thursday, February 11th, 2010

1947 1953 grill restoration 1

 

Between 1947-1953 the Chevrolet 1/2, 3/4, and 1 ton grilles were made from the same tooling. However, the paint colors and some with chrome plating made a difference. For the perfectionist, the following data will help you build a correct grille during your restoration.

Painted Grilles

1947-1948

The standard grille has inner and outer bars the body color. Horizontally, a pin stripe is run on the edge of the five outer bars. It is the same color as the cab stripe.

1949 to Mid 1951

Standard grillexs have outer bars the body color without a horizontal stripe. The inner back splash bars are Waldorf white.

Mid 1951-1953  (Korean War Years)

Outer bars on standard grilles are the body color as prior years. The back splash color changes to Thistle Gray (light gray) to match the newly introduced gray hub caps and bumpers due to Korean War shortages.

Chrome Grills

1947-1948

The deluxe grill has the five outer bars in chrome. The four inner bars remain the cab color.

1949-Mid 1951

Chrome grills for these years are plated on the outer bars. The back splash color remains the same white as the painted grill.

Mid 1951- 1953

Chrome grill bars were not available due to Korean War copper shortages.  Thus, these grills are the same on deluxe and standard trucks.

Vertical Bar Supports

1947-1953 Both Painted and Chrome Grilles

The two outer vertical bars touch the fenders and are therefore their color. Unfortunately, the reproduction grilles are easily recognized at shows because the owners have not often painted their outer bars fender color!  The three smaller inner vertical bars are semi-flat black. This prevents them from being easily seen when viewing the vehicle at a distance.

NOTE:  We see no reference to chrome outer bars being offered during the 1947-53 Chevrolet Advanced Design years.

1947-1948 GMC Grille and Bumper

Thursday, February 11th, 2010

Used only the first 1 1/2 years into this body style, these GMC grilles stand out for their different shape and very heavy duty construction. Because of it’s weight this assembly, it sets on the frame and is given extra support by a pair of steel rods extended at an angle to the frame rail.  See photo.

The grille has three horizontal bars and uses a heavier gauge metal than the four bar grille introduced in 1949. This same unit is found during 1947 and 1948 in all 1/2 ton through 2 ton GMC trucks.

On these early 1/2, 3/4, and 1 ton trucks the splash apron from the grill to the bumper is even different. The front bumper is the most unusual. It is rounded much like an automobile and has three bumper bolts on each side.  They all have the small grill guard on the 1/2 and 3/4 ton.

Some suppliers of 1947 – Early 1955 bumpers and grilles state they are all the same.  But, they are not.  The 1947-1948 stands alone!

1947 1948 gmc grill 1

1947-1948 “3” Bar (above)

1947 1948 gmc grill

Note the 3 bumper bolts.  The center secures the front splash apron and securing braces.  The other two are used by the dealers to attach GMC accessory larger grille guards to the bumper.

1947 1948 gmc grill 2

1947-1948 “3” Bar (above)

1947 1948 gmc grill 3

1947-1948 Angle Grille Support (above)

1947 1948 gmc grill 4

1949-1955 “4” Bar (above)

1947 1948 gmc grill 4

1939-1940 Chevrolet GMC Grilles

Thursday, February 11th, 2010

The 1939-1940 Chevrolet and GMC grilles may look the same when they are seen separately, however they are not! By sharing fenders, hood top, headlight stands, etc. , the grilles overall dimensions had to be the same. To keep each marquee individual, GM made the grilles different. When the two are compared side by side, what a difference!

1939-1940 GMC Grill
1940 Chevrolet Grill
1939-1940 GMC Grille
1940 Chevrolet Grille

 

1969-1970 Chevrolet Grills

Thursday, February 11th, 2010

In recent years, the 1969-1970 Chevrolet non-metal grille insert has been sold as one item. This is not the way they came!

Each of the two years used a grille insert of a different design. The 1970 style is now the one you receive when you order either year. Thus, a pure 1969 insert is becoming very difficult to locate.

1969 1970 chevrolet grills 1

1969 (above)

1969 1970 chevrolet grills 2

1970 (above)

1967-1972 GMC Grills

Thursday, February 11th, 2010

The main cross grill stamping making up the 1967-1972 GMC grilles may at first appear the same but they definitely are not.

The more noticeable difference is the large GMC letters stamped in the center of the 1967 grille (one year only). Therefore, these three letters are not placed on the hood front as during 1968-1972. Between 1967-1970, the vertical center bar (3″ x 10″) is slightly raised above the outer edges.

This vertical center bar on the 1971-1972 GMC grille is slightly depressed between its outer edges. This depression is painted satin black. At a distance, it gives the appearance of a split grille with two equal halves.

1967 1972 gmc grills 1

1967 (above)

1967 1972 gmc grills 2

1968-1970 (above)

1967 1972 gmc grills 3

1971-1972 (above)