| Born | 23 Oct, 1914 | Berlin |
| Died | 25 Apr, 1966 | Bonn |
|
Ranks
Decorations |
U-boat Commands
| U-67 | 5 Jun, 1941 | - | 2 Jul, 1941 | No war patrols |
| U-171 | 25 Oct, 1941 | - | 9 Oct, 1942 | 1 patrol (115 days) |
| U-170 | 19 Jan, 1943 | - | Jul, 1944 | 3 patrols (270 days) |
| U-548 | Aug, 1944 | - | Nov, 1944 | 2 patrols (52 days) |
Patrol info
| U-boat | Departure | Arrival | |||||
| 1. | U-171 | 17 Jun, 1942 | Kiel | 9 Oct, 1942 | Sunk | Patrol, | 115 days |
| 2. | U-170 | 27 May, 1943 | Kiel | 9 Jul, 1943 | Lorient | Patrol, | 44 days |
| 3. | U-170 | 29 Aug, 1943 | Lorient | 23 Dec, 1943 | Lorient | Patrol, | 117 days |
| 4. | U-170 | 9 Feb, 1944 | Lorient | 27 May, 1944 | Lorient | Patrol, | 109 days |
| 5. | U-548 | 11 Aug, 1944 | Lorient | 25 Sep, 1944 | Bergen | Patrol, | 46 days |
| 6. | U-548 | 27 Sep, 1944 | Bergen | 28 Sep, 1944 | Hölen | 2 days | |
| 7. | U-548 | 7 Oct, 1944 | Hölen | 12 Oct, 1944 | Flensburg | Patrol, | 6 days |
| 6 patrols, 437 days at sea | |||||||
Ships hit by Günther Pfeffer
| Date | Boat | Name of ship | Tons | Nat. | Convoy | Fate * | |
| 26 Jul, 1942 | U-171 | Oaxaca | 4.351 |  | me | ||
| 13 Aug, 1942 | U-171 | R.M. Parker Jr. | 6.779 |  | am | ||
| 4 Sep, 1942 | U-171 | Amatlan | 6.511 | | me | ||
| 23 Oct, 1943 | U-170 | Campos | 4.663 |  | bz | ||
| 22.304 | |||||||
* Unless otherwise noted the ships listed here were sunk. | |||||||
Books dealing with this subject include: Kameraden zur See, Pfefferle, Ernst, 1996 |
Decorations and ranks information is in many cases not complete. If you can help on any of those missing that would be great.